Email submission: Direction dependent deviation tuning

[krakenrf]

Leaving this email suggestion here for looking at when time allows.

Submitted by a user whose seeing somewhat predictable multipath skew on a fixed indoor antenna array. Not sure yet how feasible this suggestion is as the deviation would only be valid for that specific transmitter and that specific multipath deviation from that transmitters direction.

A better solution might be to look into a calibration algorithm that can take into account prior known transmitter/frequency bearing data to try to detect and null multipath.

First, I like to do a lot of DF from my house - unfortunately with the antenna array mounted indoors at the highest point below the ceiling. Likely due to multi path, this gives me a few challenges. While I am getting VERY consistent bearings for known transmitters, these are often off by 9-12 degrees, occasionally a bit more. 

There seem to be a pattern to the deviation: Transmitters located approximately between 315 and 45 degrees compass need a  positive correction, remaining transmitters need a negative. This impression is from sampling transmitters mainly W or between 34 and 120 degrees compass from my location.

As there may be a predictable pattern of deviation - at least in the 430-380 MHz band I monitor, I have a suggestion:

Allow direction dependent deviation tuning. Something like:

Estimated DOA	Correction
235-45			+6
45 - 90			0
90	180			-8
etc.

Ideally with user defined number of entries. I currently do not know if this deviation is frequency dependent.

Other suggestion from the user. Will be split into their own issues if we decide to work on them.

Easy switch between fixed and mobile use with a button on the map page

Fixed button:
- Prompt for Lat/Long/antenna orientation - remember last position
- Even Better, allow quick selection of saved locations (my favourite 5 hilltops in the area)
- Disable DOA when moving only
Mobile Button
- Orientation = Compass
- DOA when moving only

Remote control via API. (Could be possible ?). I like to develop a plug-in for SDRUno to set frequency, gain once an interesting transmission is detected.

Button ‘Send to RDF Mapper’ I only want estimated good DOA measures uploaded

[krakenrf]

Closing as the main submission idea isn't feasible, and the other suggestion are already being worked on or already a feature.