I am using a DELTA G3T receiver and use it for real time data logging using GREIS commands directly to PC. For the purpose, I use NetView software.
I can record GPS only/ GLO only/ GAL only or any combination of the constellations without problem using GREIS command sets.
Now, I want to log data for any of the constellation for single and dual frequency modes - as the rcvr supports triple freq for GPS and dual freq for GLONASS and GALILEO.
1. Can anybody please tell me how to operate the receiver in single frequency and dual frequency modes using GREIS command sets
2. Can anybody please provide me the the real implications of the "satellite status" (0/ 1/ 2/ 3 etc.) shown in the measurement screen (attached below). As suggested in manuals:
0 - CA/L1 data used for position computation
1- P/L1 data used for position computation
2- P/L2 data used......
3- ionosphere-free combination used .....
So, if the status is shown to be '0' - does it mean it operating in single freq (L1 only) for position solution ?
and if the status is '2' then the rcvr is using L1+L2 (dual freq opeartion) ?
and if the status is '3' then the rcvr is using all available freqs for ionospheric correction ? >>>> AM I RIGHT OR OTHERWISE ?
The manuals are not sufficient for clear understanding of the issue.
It might not direct to your answer,
Currently, I connect the G3T with serial connection and use RTKNAVI (RTKLIB) to process it.
In RTKNAVI, those option can be specified.
On the option, just follow
http://www.rtklib.com/rtklib_tutorial.htm
an alternative, just log the raw data in jps then convert to Rinex with JPS2RIN (JAVAD) and use RTKPost to process the position.
this are example of post processing with RTKLib from JAVAD jps.
https://www.facebook.com/raksitthiti/posts/10151963433252820?stream_ref=10
I am not familiar with Javad receivers but I believe that '00/01/02/03' refer to what type of measurements (code and phase) from a specific satellite is used to compute the navigation solution. The use of code and phase measurements depends on the positioning mode. For example, on Single Point Positioning mode, the receiver may use: C/A-code, P1-code, P2-code or a combination of P1 & P2 known as iono-free combination. If I remember correctly something: (f1^2*P1-f2^2*P2)/(f1^2-f2^2) with f1 and f2 being the broadcast frequencies, while P1 and P2 the code measurements. Please notice that the above formula works only for P-code. If the receiver provides C1 or C/A code instead of P1, one needs to apply differential code biases or DCB C1-P1. This is an significant aspect for high-precision application.
Now back to your attachment. Your screenshot indicates that the receiver operates in a stand-alone mode. Although the receiver tracks a number of signals, the real-time navigation solution is based solely on C/A-code. The settings for real-time positioning and raw data logging are two different things. Just enable the right parameters and you may be able to record all those signals for later post-processing. Otherwise, change the positioning computation mode (e.g., RTK) to also use the carrier phase measurements for your real-time positioning solution. However, in the later case the rover receiver needs to fetch an additional stream from a base station.