Changes between Version 6 and Version 7 of Processing/Applanix


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Timestamp:
Sep 18, 2007, 6:23:04 PM (18 years ago)
Author:
mggr
Comment:

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  • Processing/Applanix

    v6 v7  
    22http://gps.ordnancesurvey.co.uk/active.asp
    33
    4 Conversions:
    5 http://gps.ordnancesurvey.co.uk/etrs89geo_natgrid.asp
    64
    75Base station data not 1 second resolution?  Resample (interpolate using posgps).  While this doesn't improve the data, it apparently makes it more evenly applied (no internal interpolation?).  Unverified.
    … …  
    2826   1. (for all base stations - note: multiple base stations may need other stuff done)
    2927     1. ''File -> Add Master File(s)'', select the gpb file in the basestation directory
    30  
    31      
     28     1. (if you have gaps, it may offer to resample for you - not sure if we need to do this or not)
     29     1. The basestation data will come with extra info specifying the precise location and antenna type.
     30     1. Fill in the antenna type (use advanced method) if you have the info, otherwise set the height appropriately
     31     1. The base station location will come in a particular datum/coordinate system - you '''must''' correctly convert this to a form that POSGPS knows about.
     32
     33
     34== UK Rinex base stations ==
     35
     36For the O/S UK GPS network (Rinex format files), the .07o file has a header like this:
     37{{{
     38     2.1            OBSERVATION DATA    G (GPS)             RINEX VERSION / TYPE
     39GPServer 2.50 2620  Rinex Merge         11-May-07 08:03:46  PGM / RUN BY / DATE
     40NEOT                                                        MARKER NAME
     41                                                            MARKER NUMBER
     42National GPS Network Ordnance Survey                        OBSERVER / AGENCY
     430036227             LEICA SR530         4.20                REC # / TYPE / VERS
     44     0                                                      RCV CLOCK OFFS APPL
     45102098              LEIAT504        LEIS                    ANT # / TYPE
     46  3918702.4172    -7624.0107  5015612.3424                  APPROX POSITION XYZ
     47        0.0000        0.0000        0.0000                  ANTENNA: DELTA H/E/N
     48     1     1     0                                          WAVELENGTH FACT L1/2
     49     5    C1    P2    L1    L2    D1                        # / TYPES OF OBSERV
     50     1.000                                                  INTERVAL
     51  2007     5    10     9     0    0.0000000     GPS         TIME OF FIRST OBS
     52The APPROX POSITION XYZ coordinates are NOT APPROXIMATE     COMMENT
     53APPROX POSITION XYZ replaced by precise ETRS89 values       COMMENT
     54                                                            END OF HEADER
     55}}}
     56
     57Note the `ANT # / TYPE` line and the `ANTENNA: DELTA H/E/N` for antenna details.
     58
     59The `APPROX POSITION XYZ` is the precise ETRS89 location (see COMMENT sections to confirm this it says it's precise).  This needs to be converted to a WGS-84 lat/long
     60
     61Go to http://gps.ordnancesurvey.co.uk/etrs89geo_natgrid.asp
    3262
    3363-----------