PASSCAL software bug fix and enhancement list

This is a list of the bugs fixed and enhancements made in the PASSCAL source code to handle data from Reftek dataloggers. The version of the PASSCAL software that these changes are based on is 1.9.

Comments or complaints to

George Helffrich

Description

get_rate.c. Bug in struct passing as a function parameter.


*** get_rate.c.orig     Thu Apr 18 17:15:33 1996
--- get_rate.c  Sun May 21 21:54:00 2000
***************
*** 127,133 ****
          &n_ptr->offset, &n_ptr->slope);
          passcal_month_day(&t, t.day);
          t.sec = sec + ms / 1000.;
!         n_ptr->epoch = (double) (passcal_htoe(t) + ms / 1000.);
          n_ptr->line_num = line_num;
          n_ptr->modified = FALSE;
          if (n_ptr->offset == 0.0 && n_ptr->slope == 0.0) {
--- 127,133 ----
          &n_ptr->offset, &n_ptr->slope);
          passcal_month_day(&t, t.day);
          t.sec = sec + ms / 1000.;
!         n_ptr->epoch = (double) (passcal_htoe(&t) + ms / 1000.);
          n_ptr->line_num = line_num;
          n_ptr->modified = FALSE;
          if (n_ptr->offset == 0.0 && n_ptr->slope == 0.0) {

mseed2segy. Add option to allow output of 16 bit SEGY data through -s option. If you really want these fixes, ask.
pql. Change layout so that button layout is sensible on narrow screens, and to fix bugs in handling of byte-swapped mseed data. Code...
ref2segy. Bug fix to print out proper hex values for clipped trace values. Bug fix in handling of year 2000 dates. Code...
segy2mseed. Enhancements and fixes permit segy2mseed to be used on either Intel/Linux, Sparc/Linux, or Sparc/SunOS to reformat segy data in either little-endian or big-endian formats.
Bug fixes:
1. Check time gaps/overlaps properly (real brain-damage in previous code);
2. Check for mseed data offset in range of mseed data;
3. Set word order in mseed output files based on word order of host machine (not a fixed value);
4. Improper pointer use with segy_hdr parameter to write_fxd (pass as pointer, not as struct);
5. Fix incorrect call to cfree in main();
6. Fix incorrect call to julian() and pascal_htoe() in print_start_end();
7. Fix bug in steim.c that didn't write proper byte order on VAX/Intel machines (under linux).
Enhancements:
1. Removed vestigial debug code;
2. Print out SEGY file start times and time corrections (debug option -d5)
3. Add explicit time/date for request for time correction outside of range of rate file;
4. If time correction requested in RESET-RESET sequence, use time correction before reset;
5. Output of verbose output to stderr, not stdout;
Code...
refrate. Y2K bug fixes, other bug fixes, plus many enhancements to handle wider range of unusual behavior on the part of Reftek GPS clocks.
1. To handle malfunctioning GPS clocks, use clock power on/off messages to decide whether to believe clock time corrections. If clock not actually locked but DSP clock changed, retain clock offset as clock offset and not a time synch.
2. Change lex grammar to parse DSP clock reset sequences to handle additional cases:
  - multiple resets following reset jerk reset sequence
  - unlocked clock at start of data acquisition; first lock becomes time offset from start of acquitsition until first clock lock;
  - track DSP resets with unlocked clock to maintain clock offsets stemming from malfunctioning external clocks.
3. To handle Unlock-Stop sequence, keep track of last clock unlock to use as epoch time for Unlock-Stop. Maintains previous time correction to latest time before stop, instead of curtailing it after first unlock following previous phase.
4. Add in Pulse-Pulse case.
5. Prevent divide-by-zero when drift calculated between two simultaneous epochs.

Code...