Defects Index | Documentation Table of Contents
98/03/19 DEFECT in program mergedb
SYMPTOM: Erroneous tropo correction
PROBLEM: Two errors:
1) In phsres, the surface met values were being modified for the
station height, i.e.
pressure(used) = pressure(input)*exp(hgt/atm_scale_height)
If one used true surface met, this effectively resulted in
correcting for the station height twice.
2) longitude rather than latitude was used to compute delays.
The former causes a strong station height dependence in the
CORRECTION: Remove scaling of surface met values.
Change index of lat, lon, hgt vector, rllh(), from 2 to 1.
FOUND BY: M. Schenewerk
FIXED BY: M. Schenewerk
NOTES: Cross-checked these defects with the OMNI version of mergedb
with Hilla. These are limited to the "Unix" version.
This modification will be generally destributed in the next
upgrade (est. 98mar30).
June 25, 1999