Defects Index | Documentation Table of Contents
99/08/20 DEFECTS IN PROGRAM pages
SYMPTOM: When processing IGS data taken before mid-1994, error messages
appear stating that "constrained site has zero sigma", but zero
sigmas did not appear in the printout of a priori information
for these sites.
PROBLEM: adcnst.f - The computation of the site coordinate sigma, for
use as a weight in the coordinate constraint, was
not incorporating the site velocity sigmas correctly.
CORRECTION: adcnst.f - Correct computation of site coordinate sigmas.
FOUND BY: J Marshall 99/08/20
FIXED BY: M Schenewerk 99/08/20
VERSION: (see note)
NOTES: Constraints were still being applied but not at the level
implied by the user instruction. Because these defects were
causing no problems in normal operation and because other
program enhancements are underway, this changes will not be
implemented until the next upgrade.
August 20, 1999