Bernese GNSS Software Version 5.2 Tutorial

5.3 Ambiguity Resolution...SITE-SPECIFIC TROPOSPHERE PARAMETERS:------------------------------------${P}/INTRO/ATM/FLT10207.TRPREFERENCE ELEVATION ANGLE OF GRADIENT TERMS : 45.0 DEGREESMINIMUM ELEVATION ANGLE : 5.0 DEGREESMAPPING FACTOR AT MINIMUM ELEVATION ANGLE : 11.4CORRECTIONS (M) RMS ERRORS (M) ...REQU. STATION NAME NORTH EAST ZENITH NORTH EAST ZENITH ...---------------------------------------------------------------------------------- ......1 GANP 11515M001 -0.00032 -0.00014 0.12277 0.00011 0.00013 0.002282 GANP 11515M001 -0.00029 -0.00010 0.11843 0.00011 0.00012 0.001693 GANP 11515M001 -0.00026 -0.00006 0.12021 0.00010 0.00011 0.001574 GANP 11515M001 -0.00023 -0.00001 0.12354 0.00009 0.00010 0.001625 GANP 11515M001 -0.00020 0.00003 0.12381 0.00009 0.00010 0.00131...24 GANP 11515M001 0.00038 0.00087 0.13860 0.00011 0.00012 0.0018425 GANP 11515M001 0.00041 0.00091 0.13007 0.00012 0.00013 0.0022626 HERT 13212M010 -0.00138 -0.00198 0.20114 0.00013 0.00015 0.0030027 HERT 13212M010 -0.00131 -0.00189 0.19976 0.00012 0.00014 0.0015328 HERT 13212M010 -0.00124 -0.00179 0.19109 0.00011 0.00014 0.0018829 HERT 13212M010 -0.00117 -0.00170 0.19154 0.00011 0.00013 0.00178Because outliers have been removed in the previous step, the obtained a posteriori RMSerror should decrease (at least not increase). If this is not the case, it is likely that theobservations and the heavily constrained a priori coordinates are inconsistent. A detaileddiscussion will be a topic of the terminal session tomorrow.5.3 Ambiguity ResolutionTo resolve the ambiguities, we process the baselines separately one by one using the Quasi–Ionosphere–Free (QIF) strategy. This baseline processing mode is necessary because of thetremendous number of parameters. The attempt to resolve the ambiguities in a sessionsolution might require too much CPU and memory to be feasible (several iterations withinversions of the full normal equation (NEQ) are necessary).The theoretical background for the ambiguity resolution will be the topic of the lecturesession on Thursday morning. Nevertheless, you may start the processing already todayif you have time.5.3.1 Ambiguity Resolution: Quasi–Ionosphere–Free (QIF)The complete list of baseline observation files of a session (e.g., session 2070 of year 2010)can be generated by listing all phase single–difference header files in the campaign’s observationdirectory of your campaign:bern52@carina:~ > ls ${P}/INTRO/OBS/????2070.PSH${P}/INTRO/OBS/GAJO2070.PSH${P}/INTRO/OBS/HEZI2070.PSH${P}/INTRO/OBS/JOLA2070.PSH${P}/INTRO/OBS/JOON2070.PSH${P}/INTRO/OBS/JOWS2070.PSH${P}/INTRO/OBS/JOWT2070.PSH${P}/INTRO/OBS/MAZI2070.PSH${P}/INTRO/OBS/PTZI2070.PSH${P}/INTRO/OBS/TLZI2070.PSH${P}/INTRO/OBS/WTWZ2070.PSH${P}/INTRO/OBS/WTZI2070.PSH${P}/INTRO/OBS/ZIZM2070.PSHBernese GNSS Software, Version 5.2 Page 55