spp
SPP is the "simplest" resolution method, it requires observation of Pseudo Range (PR) code on a single signal.
Since it does take the signal phase into account, it is roughly x100 less accurate than PPP.
It is the easiest strategy to comply with, because it only requires a single signal.
Our framework will elect the best candidate within the preset criteria.
Unless you apply stringent criteria on signal quality, every single Epoch is taken into account in the navigation process.
By tuning the configuration scripts, providing high quality data on the input and long period of observations, we're able to obtain very good results.
- Single carrier method: need to gather fewer signals
- Providing L2 or L5 observations will enable more candidates but will not improve overall performances
- Phase observation is not required: we're most likely capable to resolve for every single Epoch. This means more accumulation in the navigation filter, but we also start farther from truth.
- No Ionosphere contribution cancellation, its impact can only be modeled
- Troposphere is modeled, but we will soon have the ability to inject it in a Kalman filter (if Navigation filter is set to Kalman), which is typically implied in PPP strategy
- Precise products like SP3 and Clock RINEX are originally not intended to be loaded, but you can provide them and directly reach more accurate solutions
- Single carrier method: need to gather fewer signals
- Ionosphere bias is modeled, less performant and not ideal. You should prefer working with RINEX4 files because they offer better modeling and possibly avoids a discontinuity when working with several RINEX files (more than 24h of data). RINEX3 is still the most common use case, and RINEX2 should be avoided.
You can use the tutorials/ dataset to explore SPP resolution technique.
For example, tutorials/GAL/mojndnk.sh will perform a static survey.
By selecting an SPP compatible configuration, you can use this navigation technique in the process.
You can use SPP navigation technique when solving CGGTTS solutions.
Refer to the tutorials/ database once again, tweak one of the CGGTTS solutions,
for example tutorials/GAL/mojndnk.sh, to its resolution process uses SPP specifically.
- Move on to Code Based PPP (CPP) and obtain similar results without Ionosphere modeling
