What I mean is once there are more than 3 or 4 lines on a graph it starts to get confusing and not so user friendly. Have a look at this for example and see how easy it is to understand (or not, maybe).
View attachment 61690
Ok I understand what you are getting at.
RF measurements are not very accurate. Although the meter may give a reading to a resolution of 0.1 dB they are not that good. The main reasons for a SNR reading to vary over time are:
- Fluctuating Meter
- Changing Atmospheric conditions
- Wobble in the satellite position (24H cycle)
One way of improving the measurements is to use a reference transponder which sort of calibrates out some of the meter and atmospheric variations. Doing this gives a more sensitive reading.
I've done this in the updated attached files and if you look at the SNR over several days it is possible to get a view of how the satellites perform relative to one another and how it changes over time including the 24H cycles.
I've also separated out the 2E and the 2F graphs to make things a little clearer.
Thanks again for the data and if you intend to do this sort of thing in the future it might be a good idea to add a stable pan European beam in the list to act as a reference.
Terry
NOTE: This forum won't allow the posting of spreadsheets so you will need to save the files on your hard disk then change the extension to ODS or XLS. They are not really text files.