Hiper V vs Hiper V+10 antenna model with OPUS
I have successfully sent hundreds of static files from the Hiper-V to OPUS. Never tried the 100mm adapter with OPUS. If you are using the adapter, just apply the correction in your antenna height.
Causes the phase center to be different? I'm sorry, this doesn't make any sense to me, it seems that it would make it exactly 10cm higher. You are still suppose to measure to the bottom of the mount. The entire thing doesn't make sense to me but maybe I'm missing something obvious. I've never used the little 10cm pole so its a moot point to me I guess.
If the 10 cm adapter has that much effect on this antenna, how much variation are we getting with other antenna models as they are mounted on a metal tripod vs fiberglass tripod vs fiberglass pole vs metal pole?
Makes me glad I used the old ground plane antenna 14532.00 for all my GPSonBM submissions. That should be less susceptible to what is underneath.
The assumption that the two antennas are the same seems incorrect given that they have different part numbers. Why would a different part number be assigned to a unit that only differed by a 10-cm rod?
Attached are the graphics associated with the antenna phase model. While externally they look identical, the internals probably do not. I also attach an extract from an old OPUS static extended solution showing exactly how the tool determines antenna height wrt phase centers.
FWIW: On a related matter, years ago there was a problem due to an antenna manufacturer’s attempt to fix a problem with their unit. It involved a physical change to the antenna’s internals. It was impossible to determine which of the models had the change by external examination. The only way to tell which units had the change was to do so via the serial number. In this case the manufacturer’s model number was not changed to reflect the modification.