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                    Incremental Updates for GAMIT/GLOBK 10.71

   This file lists updates available immediately in the incremental_updates/
   directory. These are combined into a single tar-file at the start of each
   month or when necessary to incorporate an important update. Therefore
   users generally only need to download and install the latest tar-file.
   Check for available incremental updates on the first day of each month.

                       Last updated: Monday 31 August 2020

com/sh_{cddis,get_ion,get_met,get_nav,get_rinex,get_ultrarapids,sel_rinex,
  update_eop}: Updated to accommodate switch of CDDIS access from anonymous FTP
  to authenticated secure HTTP or anonymous secure FTP. MAF 20200831

tables/ftp_info: Updated CDDIS directory for troposphere products to
  ".../troposphere/zpd/..." from ".../trop_new/...", and updated Geoscience
  Australia FTP address to "ftp.data.gnss.ga.gov.au" from "ftp.ga.gov.au" and
  RINEX directory structure. MAF 20200831

com/sh_glred: Added -a option to be passed to htoglb for network/GNSS
  combinations or when small networks with no rotation in globk estimated.
  TAH 20200830

com/sh_preproc: Fixed bug introduced 200523 which resulted in missing
  coordinates not updating. Fixed logic with update so that failures of
  sh_rx2apr result in RINEX header coordinates being used rather than fatal.
  TAH 20200830

tables/track.cmd: Edited to pass four-digit year and two-digit year in first
  two arguments to -s option. MAF 20200828

tables/: Added supplemental IGS14 and ITRF2014 sites not already included in
  sittbl. and sittbl.long, which previously contained only the IGb14 core list).
  MAF 20200825

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020040. MAF 20200821

tables/: Added igs_metadata_2119.snx and igs_metadata_2119_plus.snx, and linked
  igs_metadata.snx to igs_metadata_2119_plus.snx; updated svnav.dat.allgnss
  following igs_metadata_2119.snx. MAF 20200819

tables/: Added ngs14_2118.atx and ngs14_2118_plus.atx, and updated
  igs14_2118_plus.atx. MAF 20200818

com/{sh_dem,sh_plotvel}: Added test for longitudes > 180 to SRTM1/SRTM3, with
  default output file name using 180W-180E convention, and to recognize DEM file
  name, e.g. from sh_plotvel's "-topo_file" option, with longitudes in the range
  either 180W-180E or 0E-360E (files previously created or otherwise with names
  using 0E-360E convention will still be recognized as existing and not
  recreated). MAF 20200818

tables/: Added igs14_2118.atx, igs14_2118_plus.atx, ngs14_2116.atx and
  ngs14_2116_plus.atx, and linked antmod.dat to igs14_2118_plus.atx; updated
  igs_metadata_2118_plus.snx (igs_metadata.snx/svnav.dat), svnav.dat.allgnss
  (R731/R22 and R735/R22) and rcvant.dat (FOIA90 and HEMS631 antennas) following
  igs14_2118.atx; also added NOV701GG_1.03 (NOV71G), NOV702GGL_1.01 (NOV72G),
  NOV702L_1.01 (NOV72L), NOV702L_1.03 (NOV7L3), SPP571908273+CR (SPP273) and
  TRMR4S (TRMR4S) antennas to rcvant.dat following ngs14_2116.atx. MAF 20200814

com/sh_get_orbits: Updated description of "-srp_param" option in help to match
  sh_sp3fit. MAF 20200814

tables/: Added augmented Beidou (C) satellite body types to svnav.dat.allgnss,
  following introduction in igs_metadata_2110.snx (2020-06-16), and changed
  svnav.dat symbolic link to point to igs_metadata.snx. MAF 20200813

tables/: Added igs_metadata_2118.snx and igs_metadata_2118_plus.snx, and linked
  igs_metadata.snx to igs_metadata_2118_plus.snx; updated svnav.dat.allgnss
  following igs_metadata_2118.snx. MAF 20200811

gamit/orbits/orbdif.f: Modified to delete t-files only when SP3 files are used
  as input. TAH 20200810

tables/rcvant.dat: Added FOIF A90 GNSS (FOIA90) receiver and FOIA90 (FOIA90)
  antenna, following 2020-08-07 release of IGS rcvr_ant.tab. MAF 20200807

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020038. MAF 20200807

kf/glout/write_glb_pa.f: Updated PM rate labels to be consistent with glorg.
  TAH 20200806

kf/glsave/gw_cons.f: Updated calculation of process noise effect on a priori 
  variances saved in h-files. TAH 20200806

kf/htoglb/decsnx_soln.f: Removed additional constraints from PCO and CoM when
  -d=AC used. TAH 20200806

kf/htoglb/make_snx.f: Updated internal commenting (no code change). TAH 20200806

kf/glbak/write_loc_pa.f: Updated internal commenting (no code change).
  TAH 20200806

kf/blsum/tscon.f: Added reading GipsyX gdcat timeseries files. TAH 20200805

kf/htoglb/cresnx_site.f: Updated to fix radome NON output when no radome in
  SINEX files. TAH 20200805

kf/glsave/gw_descripti.f: Updated saving of receiver type information so that
  SINEX files with no receiver information do not replace valid entries.
  TAH 20200804

GGVersion: 10.71.012 Fri Jul 31 17:36:24 EDT 2020 Additions for Beidou, tscon
  formats, APP_PTIDE options, COD SINEX. Satellite PCO constraints. TAH 20200731

kf/glfor/glb_predict.f: Fix bug with apriori satellite PCO constraints being 
  applied twice during back soluiton and negative process noise (white noise 
  model). Problem arises in de-constraining SINEX files. TAH 20200731

kf/htoglb/{htoglb,decsnx_soln,make_snx,hw_util}.f: Updated to remove additional
  site days from COD 3-day orbit arc sinex files. Also remove PCO constraints
  from normal equations. TAH 20200730

kf/htoglb/{pack_neq,remove_neq}.f: New routines to remove sites from normal
  equations (COD SINEX only). TAH 20200730

kf/htoglb/htoglb_comm.h: COD mods. TAH 20200730

kf/htoglb/Makefile.generic: Added new routines. TAH 20200730

help/htoglb.hlp: Updated for COD mods. New -MD option to stop extra days being
  removed from COD SINEX files. TAH 20200730

tables/rcvant.dat: Added HEMISPHERE S631 (HEM631) receiver and HEMS631 (HEM631)
  antenna, following 2020-07-30 release of IGS rcvr_ant.tab, and CHC I50
  (CHCI50) receiver and CHCI50 (CHCI50) antenna. MAF/RWK 20200730

tables/dcb.dat: Added finite end date for G060/G23 (2020-162) and dummy first
  record for G076/G23 (from 2020-196) until first estimates of DCB are
  available. MAF 20200727

tables/rcvant.dat: Added UNICORE UR4B0 (UNIR4B) receiver. MAF 20200724

kf/ctogobs/wr_igs_clk.f: Updated to correctly show GNSS SYS in header.
  TAH 20200723

kf/ctogobs/merge_igs_clk.f: Updated to correctly show GNSS in header (M when
  mixed GNSS clocks are merged). TAH 20200723

kf/ctogobs/merge_igs_clk.h: Updated for clk_gnss system. TAH 20200723

help/merge_igs_clk.hlp: Document new GNSS features. -a option no longer needed.
  TAH 20200723

com/sh_sltols: New script to convert IGS short product names to long form and 
  visa versa. Names for MIT and IGS products. TAH 20200723

Summary features added July 21, 2020
- modifications for timeseries processing.
- small fixes to stop compilation errors with gfortran10. 
- Updates for Beidou satellite body types.
- Script updates to fix some issues.

kf/blsum/tscon.[fh]: Updated to read new NASA Measures XYZ files with
  TrendXYZ.xyz in file names. TAH 20200721

kf/utils/make_rms.f: Replaced COF with COD for CODE finals IGS SINEX
  combinations. TAH 20200720

com/sh_plotvel: Replaced 2p line type with selected coastline line when
  topography is plotted. TAH 20200720

kf/globk/process_glb_.f: Added REP (report) option to app_ptide command to
  changes in positions applied. TAH 20200717

kf/includes/globk_cntl.h: Documation updated on ptide_opt (new report bit).
  TAH 20200717

kf/glfor/glb_upd_apr.f: Updated to ensure ocean tide pole can be removed if 
  applied. TAH 20200717

kf/glfor/glfor.f: Updated format for ptide_opt octal output. TAH 20200717

kf/glfor/app_ptide.f: Implemented report option, made implicit none and fixed 
  small bug if pole tide had never been applied. TAH 20200717

help/globk.hlp: Documentation updated on app_ptide command REP option.
  TAH 20200717

tables/rcvant.dat: Added "PCN"-code (N) for all JAVAD receivers, assuming the
  same tracking characteristics. MAF 20200716

tables/: Added igs14_2114.atx, igs14_2114_plus.atx, ngs14_2114.atx and
  ngs14_2114_plus.atx, and linked antmod.dat to igs14_2114_plus.atx; added
  igs_metadata_2114.snx and igs_metadata_2114_plus.snx, and linked
  igs_metadata.snx to igs_metadata_2114_plus.snx; updated svnav.dat.allgnss
  following igs_metadata_2114.snx; and updated svs_exclude.dat.nanu following
  USCG NANU 2020036. MAF 20200714

gamit/orbits/orbdif.f: Deleted temporary t-files on exit; cleaned up debug.
  TAH 20200714

tables/: Added igs14_2113.atx and igs14_2113_plus.atx, and linked antmod.dat to
  igs14_2112_plus.atx. MAF 20200709

tables/rcvant.dat: Added renamed CNTT300PLUS (CTNT3P) antenna, formerly CNTT300+
  (CTNT3P), although the latter is still retained under "Previously valid",
  CNTAT600 (CNTAT6) antenna from NGS ANTEX file, and "PCN"-code for SEPT ASTERX4
  receiver (N). MAF/TAH 20200709

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020032. MAF 20200709

com/install_software: Added zsh (default shell, replacing bash, on macOS
  Catalina onwards) to instructions to set environment variables at end of
  script. MAF 20200709

libraries/comlib/multiread.f: Updated to make dimensioning of variables passed 
  in read_line consistent (only a problem in latest, strict gfortran).
  TAH 20200709

com/sh_get_rinex: Updated -list option (with ftp) to list rinex3 file names and 
  convert them to rinex2 style as is done in other parts of GAMIT. TAH 20200709

com/sh_network_sel: Updated to gracefully exit of none of the reference sites in 
  control file are available in the archives selected. TAH 20200709

tables/leap.sec: Extended to 30 June 2021 without addition of leap second at end
  of December 2020, following IERS Bulletin C 60. MAF 20200707

tables/: Added igs14_2112.atx, igs14_2112_plus.atx, ngs14_2112.atx and
  ngs14_2112_plus.atx, and linked antmod.dat to igs14_2112_plus.atx; added
  igs_metadata_2113.snx and igs_metadata_2113_plus.snx, and linked
  igs_metadata.snx to igs_metadata_2113_plus.snx; updated svnav.dat.allgnss
  following igs_metadata_2113.snx. MAF 20200707

gamit/orbits/write_summary.f: Increased bad list format to allow for more than 
  10 bad satellites. TAH 20200706

com/sh_gname: New script to 4-char g-file and 3-char sp3 file names for a given 
  4-char orbit name and GNSS selection e.f., sh_gname mitf E returns mite and
  mie. TAH 20200703

libraries/comlib/name_to_blk.f: Added explicit types for BEIDOU-3M-SECM-A and 
  BEIDOU-3M-SECM-B body types. TAH 20200703

gamit/arc/earthradTUM.f: Updated to account BEIDOU-3M-SECM-A and
  BEIDOU-3M-SECM-B body types. TAH 20200703

kf/blsum/tsfit.f: Updated time range written to PBO vel file when only one day 
  between earthquakes. Update latitude/longitude/height values in different 
  intervals to be consistent with evolving XYZ coordinates. TAH 20200701

Summary of featured added: Monday, June 29, 2020
- Reporting of GNSS type in autcln summary files. Correct GNSS name when IGS
  clock files are written.
- glbtog explicitly allows GNSS to be specified in multi-GNSS solutions.

kf/ctogobs/{rep_params,ctog_utils,fit_igs_clk,proc_phsfin}.f: Added reporting of
  GNSS used. TAH 20200628

kf/ctogobs/wr_igs_clk.f: Updated to correctly write GNSS system for clocks.
  TAH 20200628

kf/ctogobs/{merge_igs_clk.f,merge_igs_clk.h} Updated to better average clocks
  between different networks and when values edited and averaged. TAH 20200628

kf/ctogobs/ctogobs_com.h: Added saving GNSS system (sv_gnss). TAH 20200628

kf/utils/glbtog.f: Added GNSS option to allow single or multi-gnss g-files to
  written from an .org or .bak file containng multi-gnss orbits. Fixed some
  issues with antenna body type not being found with old style svnav.dat used
  (igs_metadata.snx linked to svnav.dat now recommended). TAH 20200625

libraries/comlib/get_value.f: Moved dum from I*4 to I*2 (gfortran 10.01 error
  during compilation). TAH 20200623

libraries/Makefile.config: Updated maximum Linux "OSID" to 5760 (to accommodate
  kernel version 5.7.6). The updated file is called
  libraries/Makefile.config.new in incremental_updates to avoid an unwanted
  overwrite of a pre-existing libraries/Makefile.config; move this
  libraries/Makefile.config.new to libraries/Makefile.config to use this file
  if desired. MAF 20200626

tables/rcvant.dat: Added TWIVC6050 (TWIVC5) antenna. MAF 20200625

test_install/{README,runtest}: Added "-lfreq 7" option to sh_gamit commands with
  "-gnss C" to choose explicitly the second frequency for Beidou. MAF 20200622

Summary of featured added: Sunday, June 21, 2020
- Updated formats to handle more than 32 satellites (needed for Beidou).
- Upgraded GLONASS processing in AUTCLN to better handle non-integer ambiguities
  due to remapped frequencies.
- Fixed issues with missing frequencies in the last or first cfile read in
  AUTCLN.
- Added more verification of scanning slips in AUTCLN when slip magnitude falls
  between DD_FIT_TOL LC_min and LC_max.
- Added short data segment removal at start of cleaning (controlled with
  TRIM_ONEWAY_TOL command.
- Improved network selection scripts to handle GNSS data. New sh_gnss_sel script
  which checks RINEX files to make sure selected GNSS data is available.
- Added new LAB<string> command line option in GLOBK which replaced <LAB>
  strings in GLOBK/GLORG command files with <string>. Useful for GNSS processing
  in same gsoln directory.

gamit/orbits/{read_sp3.f,wsp1hd.f}: Updated 32I to 50I to allow for 35 Beidou
  satellites. TAH 20200618

gamit/solve/{qhead2.f,lsqerr.f} Updated 32I to 50I to allow for 35 Beidou
  satellites. TAH 20200618

gamit/makex/{makex.f,j_from_c.f}: Updated 32I to 50I to allow for 35 Beidou
  satellites. TAH 20200618

gamit/clean/showrms.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/cfmrg/getcfs.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/model/setup.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  Updated message about missing lower GNSS frequencies. TAH 20200618

gamit/lib/rsp3hd.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/fixdrv/seschk.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/makexp/makexp.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/ctox/ctox.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

kf/track/read_all_rinex.f: Updated 32I to 50I to allow for 35 Beidou satellites
  TAH 20200618

kf/ctogobs/rep_params.f: Report new trim_shortseq option. TAH 20200618

kf/ctogobs/est_dd_wl.f: Updated treatment of non-integer GLONASS ambiguities.
  TAH 20200618

kf/ctogobs/ctogobs_scan.f: Add verify_scan option to see if bias flag should be
  added with jump is below max_tol. TAH 20200618

kf/ctogobs/align_phs.f: Added frequency ratio for GLONASS. TAH 20200618

kf/ctogobs/prc_ctog_cmd.f: Added trim_segment option to trim_oneway_tol command
  and allow negative values to be use to keep default values. TAH 20200618

kf/ctogobs/ctog_utils.f: Added trim_seg test and warning if frequencies change
  between c-files. TAH 20200618

kf/ctogobs/set_freqs.f: Cleaned up setting of frequencies in case c-file has
  missing frequency. TAH 20200618

kf/ctogobs/ctogobs_dd.f: Clean up GLONASS non-integer ambiguity treatment.
  TAH 20200618

kf/ctogobs/est_wlfull.f: Added effects of frequency ratios for GLONASS.
  TAH 20200618

kf/ctogobs/ctog_ut2.f: Added ctol check to make sure data present. TAH 20200618

kf/ctogobs/ctogobs.f: Added call to trim_shortseg on first pass to delete data
  in short segments between data gaps. TAH 20200618

kf/ctogobs/trim_shortseg.f: New routine to delete data in short segments between
  data gaps. TAH 20200618

kf/ctogobs/ctogobs_com.h: Added trim_seg logical to say of short segments
  between gaps should be removed at start of run. TAH 20200618

kf/ctogobs/proc_phsfin.f: Added frequency ratios for GLONASS and Updated 32I to
  50I to allow for 35 Beidou satellites. TAH 20200618

kf/ctogobs/zero_dd_wl.f: Updated 32I to 50I to allow for 35 Beidou satellites.
  TAH 20200618

gamit/model/setup.f: Fixed setting alternative C06 frequency for Beidou when
  "-lfreq 7" option used. Updated missing frequency message. TAH 20200617

tables/: Added igs14_2108.atx, ngs14_2108.atx and ngs14_2108_plus.atx, and
  linked antmod.dat to ngs14_2108_plus.atx; added STONEX S900A NEW (STXS9N)
  receiver and STXS900A (STXS9A) antenna to rcvant.dat. MAF 20200615

com/sh_plot_elmean: Updated TMP file names to make unique. TAH 20200610

gamit/lib/read_svsinex.f: Updated fatal message when GLONASS frequency not found
  to report the SV and PRN. TAH 20200608

kf/glfor/glb_predict.f: Fixed missed index calculation when applying satellite
  antenna offset process noise. Resulting in higher a priori sigma for Z
  velocity. TAH 20200608

gamit/orbits/bctot.f: Added leading zero to PRNs < 10. Made more flexible
  reading of body type. TAH 20200606

gamit/orbits/write_g.f: Modified to write svs files with GNSS satellite names
  and with more significant digits. Added body type to end of line. However,
  file needs antenna offset values to be used in analyses with antenna offsets
  estimated. TAH 20200606

gamit/orbits/read_input.f: Correct Y and Z TERR .-ROTD labels. TAH 20200608

gamit/orbits/ngstot.f: Added leading zero to PRNs < 10. Made more flexible
  reading of body type. Modified to end gracefully when no arguments are passed.
  TAH 20200606

gamit/arc/read_arc_batch.f: Added leading zero to PRNs < 10 (when gnss code
  generated from old PRN style format). TAH 20200606

com/sh_gnss_sel: Modified to better check data availability and to call
  sh_network_sel if the number of usable GNSS rinex files exceeds a maximum
  number of sites. TAH 20200604

com/sh_network_sel: Modified to support sh_gnss_sel calling it when there are
  too many GNSS sites available. TAH 20200604

libraries/comlib/name_to_blk.f: Added explicit types for GLONASS M+, K1A and K1B
  body types. TAH 20200603

gamit/arc/earthradTUM.f: Updated to account for new GLONASS body types. M and M+
  are treated the same and K1, K1A and K1B are treated the same. TAH 20200603

kf/includes/kalman_param.h: Updated GLOBK version for new LAB<lab> runstring
  option selection. TAH 20200603

kf/utils/glbtog.f: Fixed issues with decoding non-GPS satellites and make
  correct g-files. TAH 20200603

kf/gen_util/decode_comopt.f: Added new option to allow <LAB> strings in commands
  to be replaced by string <str> when LAB<str> is included in the GLOBK
  runstring options. With option LABWkRD the command line
  " bak_file <LAB>_<WEEK>.bak" is replaced with " bak_file WkRD_<WEEK>.bak".
  TAH 20200602

tables/{fes2014b_Cnm-Snm.dat,otides.dat}: Added FES2014b coefficients for orbit
  intergration and updated otides.dat symbolic link to this new default.
  MAF 20200609

tables/sestbl.10.71: Updated "Mag field = IGRF13" from "IGRF12" to accommodate
  data from 2020 onwards. MAF 20200604

tables/lfile.apr: Updated symbolic link to igb14_comb.apr from igs14_comb.apr.
  MAF 20200604

com/sh_setup, tables/{globk.cmd,glorg.cmd,process.defaults}: Changed default
  .apr-file to igb14_comb.apr from igs14_comb.apr to accommodate switch to IGb14
  reference frame from GPS week 2106 (2020-05-17; 2020-138). MAF 20200602

tables/: Added igb14.{apr,eq,vel}, igb14_hierarchy.stab_site, sittbl.IGb14,
  sittbl.IGb14.long, igb14_comb.{apr,eq,stab_site} and igb14_comb_????.apr,
  where "????" is a four-character plate ID from the ITRF2014 plate motion model
  or other published definitions (see header lines in each file for reference),
  to accommodate switch to IGb14 reference frame from GPS week 2106 (2020-05-17;
  2020-138); "igs14*" tables will no longer be updated. MAF 20200602

tables/: Added igs_metadata_2108.snx and igs_metadata_2108_plus.snx, and linked
  igs_metadata.snx to igs_metadata_2108_plus.snx; updated svnav.dat.allgnss
  following igs_metadata_2108.snx. MAF 20200602

kf/track/taiutc.f: Cleaned up code and fixed unit conflict problem. TAH 20200531

kf/track/{theory.f, get_miss.f, track_com.h}: Modified behavior of USE_BLQ
   command to allow solid-Earth tide model to be specified (IERS2010 or default
   analytic model) and to turn off model completely (NOETIDE). NOBLQ needs to be
   given as argument to turn off ocean-tide model (structured this way for
   backwards compatibility). TAH 20200531

kf/track/track.f: Fixed rounding error in num_epochs calculation. TAH 20200527

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020025. MAF 20200528

Summary of features added Wednesday, May 27, 2020
- Changes to stop fatals when data occurs in a gap in station.info entries
  (often associated with firmware updates.
- Changes made to increase Glonass data yields due to issues with RINEX 2
  headers.
- New cddismgex archive to get RINEX 3 data from CDDIS MGEX area (needed for
  data collected before MGEX data was saved in the same directories are GPS
  data.
- Fixed some issues with occasional failures of parallel runs.

gamit/arc/earthradTUM.f: Fix calculation of mjd but has no impact due to antenna
  thrust not being computed In this routine. TAH 20200526

gamit/model/update_coords.f: Tested antenna changes to see if messages should be
  printed about changes. TAH 20200527

gamit/makex/makex.f: Fixed format reporting frequencies. TAH 20200526

gamit/makex/rhead.f: For Glonass processing: Removed code that set P2 to x2 when
  C2 available. Made P2 be secondary choice to C2 so that files with C2 in
  header but no C2 data, will include the P2 data in the x-file. TAH 20200526

gamit/makex/rbatch.f: Added back feature to have blank line act as EOF in batch
  file. TAH 20200526

gamit/lib/sel_obtyp.f: Fixed initialization loop to 6 (from 4) for iobtypx;
  Changed secondary choice to P2 for Glonass when C2 in header. TAH 20200526
 
gamit/lib/rstnfo.f: Updated to allow a gap between end and start times of up to
  6 hours. This happens with firmware updates where the gap can be 1-minute to a
  few hours. There is probably no data in gap but GAMIT is still generating
  epochs during the gap (makex and maybe model fatals). Cleaned up indenting
  around modified code. TAH 20200524

com/sh_sp3fit: Incorporated GNSS into decoding svs_exclude.dat. Line format is
  now Gnn, Rnn, etc. When gnss==G, old nn only designation allowed. Note: doy is
  3-digit. TAH 20200524

com/sh_gnss_sel: Fixed issue with hardwired date in find command. Updated help
  message. TAH 20200524

com/sh_preproc: Made lfile test name more unique by adding expt and doy to
  temporary name (conflicts in parallel runs could lead to zero length
  lfiles). TAH 20200523

kf/ctogobs/ctogobs_dd.f: Fixed error in replaced integer do loop. TAH 20200520

tables/otl_FES2014bM_MRG.list: Merged FES2014 list from otl_FES2014bM_IGS.list
  and otl_FES2014bM.list generated at Chalmers University. TAH 20200520
 
kf/track/{theory.f, get_miss.f, track_com.h}: Modified behavior of USE_BLQ
  command to allow solid-Earth tide model to be specified (IERS2010 or default
  analytic model) and to turn off model completely (NOETIDE). NOBLQ needs to be
  given as argument to turn off ocean-tide model (structured this way for
  backwards compatibility). TAH 20200520

Wednesday 20 May 2020

com/sh_get_grids: New script from S. McClusky to download grids from
  ftp://everest.mit.edu to the current working directory. MAF 20200520

kf/update_pmu/igs_to_pmu.f: Added feature to have UT1 in the PMU file be
  generated by integrating the LOD values rather than using the globk estimates.
  This can be useful when generating Earth fixed SP3 files from inertial t-
  files. TAH 20200518

com/sh_gnss_sel: New script to add GNSS networks to sites.default.yyyy.ddd
  files. Assumes that the rinex files have been downloaded so that data types
  available in the files can be determined with scan_rinex. TAH 20200518

com/sh_plotvel: Added coast line specification -clw option. Default remains
  unchanged. TAH 20200515

com/sh_network_sel: Added feature to update existing sites.defaults file with
  additional net names added. Removed default apr_file name. Useful for having
  GPS and GNSS networks separate. TAH 20200515

com/sh_rx2apr: Forced rinex header coordinate extraction if RINEX 3 files which
  svpos and svdiff can't read. Cleaned up site name extraction when directory
  included in site file name. Cleaned up indentation. Remove spherical l-file
  output. TAH 20200518

com/sh_rx2apr: Added RINEX 3 trap to use approximate coordinates in RINEX header
  if file given with "-site" option is RINEX 3 or results of SVPOS if file given
  with "-site" option is RINEX 2 but file given with "-ref" option is RINEX 3.
  MAF 20200517

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020023. MAF 20200515

tables/rcvant.dat: Added STONEX S980 (STXS98), STONEX S980A (STX98A) and STONEX
  S990A (STX99A) receivers, and STXS990A (STX99A) antenna. MAF 20200514

Summary of added features and updates. Tuesday, May 12, 2020
- The Gipson 2017 VLBI model updated. Default: added UT1 libration term and
  keeps the IERS2010 model.
- New scan_rinex utility added assess observables in RINEX 2 and RINEX 3 files.
- Added pre-fit millisecond clock jump scanning and fixing in autcln. Normally
  not needed and default is not to do it. New status report option to look at
  pre-scan clock residuals. Useful if lots of BAD PREFIT data delete messages.
- Added lower frequency selection for GNSS processing (makex and sh_gamit -lfreq
  option) so G5, C7, E6/7/8 are options of lower frequency instead of G2, C6 and
  E5.
- Updated autcln to avoid errors in autcln/solve when some stations are missing
  a frequency band completely.

libraries/includes/freq_def.h: Fixed small error in E8 frequency (0.001E6 Hz)
  (impact MW-WL looked like LG in cview. TAH 20200512

gamit/makex/settyp.f: Added E8 to list of valid frequency. TAH 20200512

gamit/includes/model.h: Increased atxfrq to 4-characters and additional entry
  for primary and secondary choice of ANTEX frequency. TAH 20200512

gamit/utils/convert_antpcv.f: Updated read_antex call for new atxfrq definition.
  TAH 20200512

gamit/model/setup.f: Added selection of alternative lower frequency.
  TAH 20200512

gamit/model/get_svantpcv.f: Updated to allow primary and secondary choice of
  frequency read from ANTEX file. TAH 20200512

gamit/model/get_antpcv.f: Updated to allow primary and secondary frequency
  choice of frequency read from ANTEX file. TAH 20200512

gamit/model/get_antinfo.f: Modified format for reporting ANTEX frequencies used.
  A * next entry shows if primary or secondary frequency used for PCO/PCV.
  TAH 20200512

gamit/lib/sel_obtyp.f: Added additional data selections based choice of lower
  frequency. Added entries for G5, C7, E6/7/8; defaults are G2,C6 and E5.
  TAH 20200512

gamit/lib/read_antex.f: Passed modified atxfrq array now with 4 characters and
  three entries: (1) L1, (2) primary choice for L2, (3) secondary choice for L2
  where L2 if the lower frequency selection. TAH 20200512

tables/ftp_info: Added GFZ Potsdam as source for MGEX orbits. Currently SP3
  files need to be downloaded before sh_get_orbits is run. TAH 20200511

kf/ctogobs/{ctog_utils,read_cfheads}.f: Updated save non-zero frequencies when
  c-files are read. Solve has problems if the first c-file is missing a
  frequency band and autcln could have problem if last c-file is missing
  frequencies. This can happen with GNSS data missing standard frequencies at
  some sites. TAH 20200511

kf/ctogobs/set_freqs.f: Moved code that saves frequencies to ctog_utils.f and
  read_cfheads.f. TAH 20200511

kf/ctogobs/upd_cf_sd.f: Added code to write both frequencies bands to all c-
  files even if one band is missing (all data would have been deleted).
  TAH 20200511

gamit/makex/makex.f: Modified gnss input so that a lower frequency selection can
  be passed. For example C7 for the gnss runstring parameter will select C7 as
  lower frequency instead of default C6. G5, E6, E7 and E8 are also options.
  TAH 20200511

gamit/lib/sel_obtyp.f: Added option for lower frequency selection. TAH 20200511

gamit/makex/rbatch.f: Reading of GNSS as 2-character with lower frequency option
  added. TAH 20200511

gamit/includes/global.h: Added gnsslf which contain GNSS and lower frequency
  selection (e.g., G or G5 for L5 lower frequency. TAH 20200511

gamit/makexp/makexp.f: Added passing gnsslf string into makex batch file.
  TAH 20200511

com/sh_makexp: Added -lfreq option to select lower frequency for G,C and E, e.g.
  "-gnss E -lfreq 7" will select L7 (E5b) as lower frequency for Galileo instead
  of L5 (E5a). Options allowed are G5, C7, E6/7/8. TAH 20200511

com/sh_preproc: Added -lfreq option (see sh_makexp). Fixed bug with g-file being
  checked with "^G" rather than "^$gnss". TAH 20200511

com/sh_gamit: Added -lfreq option (see sh_makexp); -remakex Y will be needed if
  older x-files already exist in processing directory. TAH 20200511

kf/ctogobs/prc_ctog_cmd.f: Added new option to prefit_clk command to remove
  millisecond jumps in clocks. Not a common problem but could be useful for some
  data. TAH 20200510

kf/ctogobs/ctog_utils.f: Initialization of prescan_msj option. (Default no
  scan). TAH 20200510

kf/ctogobs/prescan_clk.f: Added some commented out write statements to print
  information on clock fits. TAH 20200510

kf/ctogobs/ctogobs.f: New call to prescan_msj. TAH 20200510

kf/ctogobs/prescan_msj.f: New subroutine to scan and remove millisecond jumps.
  TAH 20200510

kf/ctogobs/ctogobs_com.h: Now logical added to implement prescan_msj. New
  version number for autcln. TAH 20200510

kf/ctogobs/fit_igs_clk.f: Limited updating linear fits to clocks with < 100 ns
  RMS. Millisecond jumps in clocks can cause high RMS scatters. Corrected
  indexing on frequencies (not issue since all frequencies are mapped to common
  frequency at this point). TAH 20200510

kf/ctogobs/upd_cf_sd.f: Removed a debug statement. TAH 20200510

kf/ctogobs/Makefile.generic: Added prescan_msj subroutine. TAH 20200510

gamit/utils/scan_rinex.f: New routine ported from GG11 to scan RINEX files to
  determine the numbers of observations of different types. Modified to add
  leading zero to PRNs<10 in output and generated a sorted output.
  RWK/TAH 20200509

gamit/includes/dimpar.h: Added max_ob11, maxgnss, max_sch for GG11 for
  scan_rinex program. TAH 20200509

gamit/utils/rinex.h: New include file from GG11 for use in scan_rinex.
  TAH 20200509

gamit/utils/Makefile.generic: Added scan_rinex to Makefile. TAH 20200509

com/link_gamit_bin: Added ../utils/scan_rinex. TAH 20200509

gamit/lib/{srotat,rotsnp_sofa}.f: Added module for hpeop_gipson and call to
  calc_hf_gip_xyu. This code is implementation of Gipson 2017 VLBI model. Both
  of these routines have same block of code for HF EOP but some time argument
  variable names differ. TAH 20200509

gamit/lib/hfeop_gipson.f90: New module implementing Gipson VLBI model. Libration
  and solid Earth terms were in a priori so this model needs these terms added
  and is compatible with Desai and Sibios implementation. TAH 20200509

gamit/lib/hfeop_desai.f90: Modified to remove functions and subroutines that are
  common to hfeop_gipson.f90. TAH 20200509

gamit/lib/hfeop_util.f90: Functions and subroutines common to the two HF EOP
  modules. TAH 20200509

gamit/lib/Makefile.generic: Modified to add new hfeop_gipson.f90 and
  hfeop_util.f90 modules and subroutines. TAH 20200509

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020020. MAF 20200508

Summary features added Tuesday 5 May 2020:
- Desai and Sibios HF EOP Model added, UT1 libration set in defaults.
- Fixed -autooff in htoglb (-a was OK). Updated documentation to reflect that
  this option should be used for subnetworks processed in baseline mode.
- Fixed reading of FES2014 list and ocean tide potential models. Critical
  update if these models used.
- Fixed reading of dates near the ends of years in UNR time series files.
- New MJD->date option in cplotx (field type 3).
- Added secondary list selection option in sh_network_sel (allows a primary list
  that should all be selected if they are available and their total number is
  less than the total network size.

tables/{sestbl.10.71,sestbl.10.71.MIT}: Set Etide model to IERS10 and added UT1
  Libration to Earth Rotation model. TAH 20200505

kf/{ctogobs/ctogobs_dd,svpos/spcsnr}.f: Replaced floating point do-loops with
  integer code. TAH 20200505

kf/htoglb/cresnx_file.f: Updated model names output to SINEX file. TAH 20200505

kf/gen_util/gamit_mod_n.f: Updated model names for UT1-Libration (UT1-LIBR) and
  Desai and Sibois (D&S2016). TAH 20200505

gamit/model/setup.f: Updated output documentation to reflect Desai and Sibois
  model, and the string assigned to speopmod character string. TAH 20200505

gamit/fixdrv/mdmake.f: Updated decoding of "Earth Rotation" sestbl. entry.
  TAH 20200505

gamit/orbits/{get_svcoords,partl,sp3tot,trot}.f: Replaced arbitrary setting of
  iut1pol bit mapped diurnal/semidiurnal models with value read from sestbl.
  TAH 20200505

gamit/lib/rot_gfile.f: Replaced setting iut1pol to zero with value read from
  sestbl. TAH 20200505

gamit/lib/{rotsnp_sofa.f,srotat.f}: Implemented new Desai and Sibois diurnal/
  semidiurnal ocean tide EOP model. TAH 20200505

gamit/lib/Makefile.generic: Added hfeop_desai.f90 and get_iut1pol.f routines.
  TAH 20200505

gamit/lib/get_iut1pol.f: New routine to get iut1pol value from sestbl. Called
  rather than arbitrary set values in different routines. TAH 20200505

gamit/lib/hfeop_desai.f90: New module to implement the Desai and Sibois model.
  TAH 20200505

gamit/arc/{earthradTUM.f,sbfn.f}: Replaced arbitrary setting of iut1pol bit-
  mapped diurnal/semidiurnal models with value read from sestbl. TAH 20200505

gamit/arc/satprop.f: Modified to remove repeated Block IIIA not modeling message
  when NCLE1 albedo model used. TAH 20200504

kf/htoglb/htoglb.f: Fixed decoding -a/-autooff option so both forms work. Only
  -a worked in earlier version. This would cause problems when baseline mode
  networks are combined. TAH 20200504

gamit/makex/{makek,makex}.f: Fix misnamed variable causing MAKEK to fail; fix
  inconsistent dimensions in both routines, with no effect; fix printing of the
  observables to the infor file, also with no effect. RWK 20200504

tables/rcvant.dat: Removed comment ("?") from beginning of records for several
  receivers and antennas without IGS codes but previously added to rcvant.dat by
  MIT. MAF 20200504

com/{links.arc,links.day,links.com}: Added test to only link otides.dat if no
  valid local file. Allows use of different ocean tide models (FES2004 versus
  FES2014b). TAH 20200503

gamit/arc/read_otides.f: Fixed logic in reading files with more than 18
  frequencies (FES2014b) and added output of model name to GAMIT.status, cleaned
  up debug output. Critical update when using FES2014. TAH 20200503

gamit/grdtab/get_otl_list.f: Updated reading of TANG RADI lines for FES2014
  format to ensure sites found (no sites found with old code). Critical update
  when using FES2014. TAH 20200502

tables/otl_FES2014bM_IGS.list: Updated model name to FES2014b from FES2014M,
  which had been in the file. TAH 20200502

com/sh_xtosess: Updated definition of "prn_list" to accommodate constellation
  prefix (G, R, E, C, etc.) to PRN number. RWK/MAF 20200430

kf/glinit/get_aprioris.f: Fixed mapping of ECOM-1 radiation parameters for old
  (pre 1.07) binary h-files. Impact when orbits are tightly constrained in RELAX
  solutions. TAH 20200429

kf/glist/glist.f: Increased number of digits in reported h-file version.
  TAH 20200429

tables/frames.dat: Added Caribbean ("CARIB18") and Puerto Rico-Virgin Islands
  ("PRVI18") reference frames relative to IGS14 from Wang et al. (2019),
  doi:10.3390/rs11060680. MAF 20200428

com/{sh_gamit,sh_make_sky_pngs}: Added .png extension to GMT's
  ps2raster/psconvert -F option and rename if GMT creates PNG file with double-
  extension ".png.png"). Y.-H. Chang/J. A. Garmen/MAF 20200426

kf/globk/{add_GGV.f,read_glb_mar.f,Makefile.generic: New routine, add_GGV, to
  add GGVersion information to the GLOBK description line at the end of
  read_glb_mar to allow better assessment of version of GG installed.
  TAH 20200426

help/htoglb.hlp: Expanded the documentation about correct procedures for
  combining sub-networks when baseline mode has been used in GAMIT processing.
  TAH 20200425

kf/blsum/tscon.f: Updated reading dates from UNR txyz2 files. Old algorithm
  could have errors of a day near the end of the year and assign values to the
  wrong year. TAH 20200424

tables/svs_exclude.dat.nanu: Updated following USCG NANU 2020017. MAF 20200424

com/sh_network_sel: Added a secondary list of stations so that the core list can
  contain critical stations (the number of stations can be less than the total
  network size). After selection of all core stations, the secondary list is
  used for the priority of these stations. Added a -clear_list option to force
  the re-download of archive data holdings. TAH 20200422

Kf/utils/global_sel.f: Updated to handle non-"_GPS" site names in a priori file,
  changed reporting of short lists. TAH 20200422

help/head.snx: Updated DOMES codes. TAH 20200420

tables/rcvant.dat: Added SEPVC6150L (SEPVC6) and SEPVP6050_CONE (SEPVP6)
  antennas, and CHC P5E (CHCP5E) receiver. MAF 20200420

kf/utils/make_rms.f: Changed F6.1 to F6.2 format when writing statistics.
  TAH 20200417

kf/htoglb/mstinf.f: Changed dimensioning so that max_site sites can be in a
  station.info file to be merged with another one. E. D'Anastasio/TAH 20200417

tables/: Added igs14_2101.atx, ngs14_2101.atx and ngs14_2101_plus.atx, and
  linked antmod.dat to ngs14_2101_plus.atx; added igs_metadata_2101.snx and
  igs_metadata_2101_plus.snx, and linked igs_metadata.snx to
  igs_metadata_2101_plus.snx; updated svnav.dat.allgnss following
  igs_metadata_2101.snx. MAF 20200416

gamit/orbits/yawtab.f: Added one day to date for call to svnav_read because the
  start of the t-file may occur before the start time of a PRN number record.
  A. Koulali/R. Pickle/MAF 20200414

com/{sh_dem,sh_plotvel}: Updated to write new .grd-files to current working
  directory, rather than ~/gg/maps/; corrected definition of maximum longitude
  in "minmax" variable when passing topo_file name from sh_dem to grdimage for
  plotting, and updated logic to derive an illumination .grd-file from topo_file
  by requiring "topo_file" to be passed as the argument to the "-illu_file"
  option. MAF 20200413

com/sh_dem: Removed extraneous "-fg" option from GMT's grdcut command for
  SRTM3, SRTM30 and SRTM30_PLUS. S. Nistor/MAF 20200403

tables/sites.defaults: Appended to updates/source/tables.10.71.tar.gz, because
  it was missing from the original release, and incremental_updates/tables/.
  R. Romero Andrade/RWK/MAF 20200403

com/sh_sopac: Removed leading slash ("/") in definition of "sdir" variable to
  avoid double-slash ("//") typo in host URL. R. Pickle/MAF 20200402

com/links.arc: Changed links so that local ut1./pole. file will be retained
  during linking. TAH 20200401

com/sh_sp3fit: Changed logic to all allow multi-day orbit arcs of more than 3
  days (orbits modified to allow 9-day arcs). TAH 20200401

gamit/arc/read_arc_batch.f: Updated logic for reading arc.out file name and the
  hidden debug featutes that are included on that line. TAH 20200401

gamit/includes/orbits.h: Increased dimensioning to allow 9-day arcs.
  TAH 20200401

gamit/orbits/{orbdif,orbfit,orbrms,plt_postfit}.f: Modified outputs to add MJD
  to ends of residual values so that true times can be plotted. TAH 20200401

kf/plot/{dxaxis_mn,dxaxis_mx,get_xy_scale,make_line,plot_spec,report_scale}.f:
  Added new data type field to have MJD interpreted as date rather than
  converted to decimal year (help/{cplotx.hlp,ts_pos.plt,ts_pos2.plt} also
  updated accordingly). TAH 20200401

tables/nbody: Updated to use DE405 (little-endian) file for 1900-2050 from JPL
  (ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux/de405/lnx1900.405). MAF 20200401

tables/frames.dat: Added rotation rate vector for North America relative to
  IGS08 from Kreemer et al. (2018), doi:10.1029/2017JB015257. MAF 20200331

tables/hi.dat: Added DHTCR (= DHARP) height code for SEN671575-series antennas.
  P. Fang/Y. Bock/MAF 20200326

tables/rcvant.dat: Added STONEX S700A (STXS7A), STONEX S850A (STXS85) receivers,
  and STXS700A (STXS7A) antenna, following 2020-03-25 release of IGS
  rcvr_ant.tab. MAF 20200325

test_install/: Added missing "-netext" option to first sh_glred commands for
  2016 and 2014 in README; changed tssum product ID to conventional form of
  "mit.final_igs14" from "mit.final.igs14" in README and runtest. MAF 20200323

tables/: Updated igs_metadata_2097.snx and igs_metadata_2097_plus.snx; updated
  svnav.dat.allgnss following igs_metadata_2097.snx; updated eq.def with
  preliminary definitions for July 2019 Ridgecrest, California, earthquakes.
  MAF 20200323

tables/dcb.dat: Corrected open-ended end date for G037/G07 to 1993-334T23:59
  and removed erroneous extra line for G063/G01 (2019-305T00:00 to
  2019-304T23:59). S. Hreinsdottir/MAF 20200323

test_install/README: Corrected erroneous "-gnss" option in one sh_glred command
  to "-netext". MAF 20200319

tables/: Added finite end date for G034/G18 (2020-070) and dummy first
  record for G075/G18 (from 2020-073), until first estimates of DCB are
  available, in dcb.dat; updated igs_metadata_2097.snx and
  igs_metadata_2097_plus.snx to versions with corrected start date of G075/G18;
  updated svs_exclude.dat.nanu with NANU 2020014. MAF 20200319

tables/: Added igs14_2097.atx, ngs14_2097.atx and ngs14_2097_plus.atx, and
  linked antmod.dat to ngs14_2097_plus.atx; added igs_metadata_2097.snx and
  igs_metadata_2097_plus.snx, and linked igs_metadata.snx to
  igs_metadata_2097_plus.snx; updated svnav.dat.allgnss following
  igs_metadata_2097.snx. MAF 20200317

gamit/lib/rstnfo.f, kf/htoglb/{hfupd_ut.f,mstinf.h}: Changed length of comment
  to 36 characters from 30 (rstnfo.f), 24 (hfupd_ut.f) and 132 (mstinf.h)
  characters. TAH 20200317

com/{sh_plot_rinex,sh_rename_rinex}: Corrected calls of "CRX2RNX" (the original
  program name) to "crx2rnx" (our distribution name, in gamit/bin/).
  MAF 20200311

tables/rcvant.dat: Updated "PCN"-code based on old rcvant.dat.200109 for
  ROGUE SNR-8000 (P), TPS ODYSSEY_I (N), LEICA GS15 (C) and SEPT POLARXS (N)
  receivers. MAF 20200310

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