using Reachview is v2.24.2, RTKPOST v2.4.3 Emlid b33
I have a healthy survey - very open space, nice and long (>600 mb of .obs). Working my way through config settings for PPK with a snippet - about 3 hours of survey work.
I have mucked around with all kinds of configs but cannot get the first half of the survey to fix, second half is great. Start going round and round in circles and getting frustrated so I switched and ran the filter type to backward (not something I need to do regularly) … now the back half of the survey (in time) is floating and half way through the processing, boom, get a fix in the first part of the survey (in time) all the way to the end (start in time).
I have stripped this right back to just GPS & GLO, couple of different masks - same result.
Summary: Forward filter type gets fix in the second half of the survey, Backward filter type gets fix in the first half of the survey.
Obs from base and rover are good and plentiful and no irregularities around the switch (float to fix) that I can see.
Anyone seen this kind of behavior before?