Hello,

I'll try to modify the gsi to be able to import it

A valid GSI looks like

110306+00090073 84..16+00000000 85..16+00000000 86..16+00000000 87..16+00000000 88..16+00000000 
110307+00090074 87..16+00000000 88..16+00000000 31..06+01088065 21.322+29676045 32..16+01088053 33..16-00005150 22.322+10030107 51..1.-0007+000 81..06-01086644 82..06-00055344 83..06-00005150 
110308+00090072 87..16+00000000 88..16+00000000 31..06+00795234 21.322+08078441 32..16+00795211 33..16+00005996 22.322+09952104 51..1.-0007+000 81..06+00759261 82..06+00236397 83..06+00005996 
...

The first line defines a station followed by the measurements obtained at this station, i.e., from 90073 to 90074, from 90073 to 90072 etc. The station line does not contain observations (just coordinates coded by 84, 85, 86).

kind regards
Micha