The application is a rover with self-contained data collection. Can someone provide an example of the data format that would be collected on the SD card when using a Postcard w/Portability Shield? I am not planning to use RTK correction or any other external interface besides the GPS antenna and SD card. Are there any other equipment recommendations?
Hi Jeff (@Jeff_G ),
Postcard uses the LG290P GNSS from Quectel. It can output: standard NMEA messages; plus Quectel-proprietary PQTM messages (which also follow the NMEA format); plus RTCM format correction messages. You can log all three to the SD card. NMEA and PQTM are ASCII and human-readable. RTCM is binary and the format is copyright (available from www.rtcm.org). The GNSS Protocol Specification is your friend here. Link below.
I hope this helps,
Paul
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Much appreciated. It looks like a lot, but maybe it won’t be so bad once I dive in. I may use an old iPhone with SW Maps as an intermediary if I need to punt. The CSV output from SW Maps works well for what I need.