>> The real question is how much of a sky view you get. > >> Ideally you would like a clear view of the sky from >> about NE clear around to NW (270 degrees). > > That would opt for the balcony, as it faces north > and extends the slanted roof, so basically clear > view from NE to NW down to the horizon. >
Take a look at (yes M$ Silverlight is needed...:( ) http://www.gnssplanningonline.com/ On "Settings" enter 1) your position (lat, lon, h) - or chose approx position from map. 2) change "cutoff" to 0 deg 3) change "Time span" to max (24h). On "Satellite library" 1) Disable Glonass, Galileo, BeiDou and QZSS (only GPS remain selected) Then view "Sky Plot". This is an illustration where the satellites can be seen by your antenna, with no blocking from house, trees, mountains etc. The blue outer circle represents the horizon, north up, etc. Circle center is straigt up into the sky. The fainter grey circles shows 30 and 60 deg elevation from the horizon. - Moving the time-ruler (lower-right corner) will show the satellites move over the selected position. - While moving the time-ruler around, notice that there is a circle from north horizon:ish and down (with a latitude of ca N45deg, where there are never any satellites. - Where this circle is depends on your latitude. (check N90deg -north pole and N0deg (equator) to get a feel of how the priority directions(azimuth)/elevations are. You can model your specific obstruction environment at different possible antenna sites with "Settings" -> "Obstructions". What is an obstruction? it depends, but first order approx is that anything that blocks your view will count. What kind of GPS-receivers will you use? Old receivers (10+years) will need better installations/locations. Modern high sensitivity receivers will work decently within many houses. For long cable runs, older receiver will be more picky, etc. Good luck! -- Björn _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.