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2018-09-14 17:28:22 -0500 | marked best answer | gpsd_client with GLONASS and GPS? I'm using the gpsd_client on kinetic with a GNSS receiver that uses both GPS and GLONASS and outputs a joint GNSS solution (GPS+GLONASS). First of all, is the gpsd_client compatible with GLONASS, i.e., will it take in information about GLONASS satellites and display it in a relevant way? Perhaps related to this topic I seem to have some problems with the variables the topic /extended_fix:
I understand that the gpsd_client only displays the information from the gpsd. This means that part of my question is clearly about the function of the gpsd (and should be asked elsewhere): can the gpsd read NMEA messages from a joint GNSS solution (e.g. GPS+GLONASS, which is what you typically have in a modern GNSS receiver), i.e., read NMEA messages starting with GN. The ROS part of my question is: can the gpsd_client work/display a joint GPS+GLONASS positioning solution together with correct information in the topic extended_fix and fix? I assume that the values for longitude, latitude, and height will be correct (i.e., the gpsd_client doesn’t care if it is a single GNSS solution or a multi-GNSS solution), assuming that the gpsd can decode the NMEA messages from a multi-GNSS positioning solution. It appears as if the gpsd_client at least can display data from a single GNSS, since the message sensor_msgs/NavSatStatus (included in topic fix) has a flag for which GNSS that is used. However, for the topic extended_fix, it is unclear if the satellite information is displayed correctly. Part of my question is therefore if the satellite_visible* variables can display information about satellites from several GNSS at the same time? |
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2017-11-30 02:48:36 -0500 | edited question | gpsd_client with GLONASS and GPS? gpsd_client with GLONASS and GPS? I'm using the gpsd_client on kinetic with a GNSS receiver that uses both GPS and GLONA |
2017-11-30 02:46:28 -0500 | commented question | gpsd_client with GLONASS and GPS? I’m glad that you have commented, but from your comments it appears as if you have not really read or understood my ques |
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2017-11-28 02:48:33 -0500 | asked a question | gpsd_client with GLONASS and GPS? gpsd_client with GLONASS and GPS? I'm using the gpsd_client on kinetic with a GNSS receiver that uses both GPS and GLONA |