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changes.log
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changes.log
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Revisions
1.17 Added data bit recording and write to file (this feature is not completely
debugged), corrected error in satpos_almanac, Thanks Tak! Also corrected an
error in navmess, thanks Goetz! Also added an indication on page 1 which
interface (ISA or PCI) is being used and the almanac page number.
1.16
Addes #ifdefs to allow compilation by DJGPP. Setup use of PCI interface
Modified almanac read logic to check when a new almanac is available
1.15
Added more integrity checking into the data bit synchronization in the pull-in
state. Instead of just checking the change in phase and checking that it is
very close to a +-90 to -+90 transition it also stores the last 20 ms sign
values and they must all be the same and opposite of the transitioned ms sign
before declaring the edge of a data bit. Modified parity check algorithm to
be more efficient. Also made constants for number of channels and register
address and data address.
1.14
Fixed error in nmea checksum routine. Added another display page and
supporting data structure to show parity errors in navigation message
decoding.
1.13
Made mods to get ICP working better, trying to use just the last 0.1 second
of carrier phase data. Phil Bender added NMEA serial port messages (needs
some more work, see files serport.cpp, nmea.cpp, fwinter.cpp). Additional
entries at the bottom of rcvr_par.dat are used to set up the NMEA messages.
Adapted program so it can compile under Borland (#ifdef BCPP) or Microsoft
Visual CPP (#ifdef VCPP) Also split up the program into library components
to make it more modular (see GPS_ISR.CPP and NAVFIX.CPP)
1.12
Removed some of the ephemeris checks that were causing the rejection of
valid ephemeris messages and also caused it not to accept ephemeris
messages from a constellation simulator. Fixed up the 1 second data bit
ambiguities to recover measurements that previously had been thrown out.
1.11
Cleaned up the display when a satellite is removed from consideration
Fixed an ephemeris management problem that caused occasional use of the
ephemeris from the wrong satellite
Modified the ephemeris mgmt to check IODE and IODC to decide when
to grab a new ephemeris + ephemeris integrity checks
Improved the almanac page redundancy check
Moved Pr, dPR, Tropo and Iono into the main channel data structure
Set up default iono parameters when ion_utc.dat not available
Added a debug output that provides raw measurements data and ephemeris
which provides more processing capability than pseudorange & delta pseudorange
Fully implemented the GPSRCVR.LOG output options
Added the option in RCVR_PAR.DAT to use CTL (carrier tracking loop) or
ICP (integrated carrier phase) data for velocity computations (ICP seems
to have bias problems)
1.10
Made the read of rcvr_par not so picky as long as the text field has no spaces
Fixed a problem in CMatrix with the Borland 5.02 compiler
Re-aligned column titles for pages 2-4
1.09
Corrected hot start problem
Hooked up almanac data type check
Started using Aberto's matrix libraries for DOP calculations
Minor changes in pream
Got rid of tmax in nav_fix
Added more mesaurement integrity checks in nav_fix
Added header and tdop to display
1.08
Corrected tracking loop bias problem (I hope!)
Corrected code loop doppler correction constant
1.07
Added check for bit sync in pull-in, must be set to transition to track
Extended pull-in to end of data bit to reduce transients when going into track
Added integrated carrier phase processing for velocity
Improved GPS time alignment mode (for any nav fix rate)
Corrected iono correction computations (again)
Corrected tropo correction sign
Reduced debug arrays to reduce code size
Added two new display pages, iono & tropo, and pseudorange and delta
pseudorange
Not used yet but getting set up to use Alberto Perez's matrix libraries
1.06
Added new format for Kalman.dat
corrected iono correction computations
Added more comments
1.05
Improved Code tracking loop
Added GPS time alignment mode
Added time zone input from rcvr_par.dat
Corrected errors in satpos_ephemeris
Corrected current.eph file format
1.04
Corrections in Gpsfuncs
Added new display page for nav message HOW and TOW
1.03
New preamble routine
Added Carrier phase aiding
***********************************************************************/