Hello, I have this question: the online positioning services (Es. NOAA OPUS) ask for the antenna model.
Of course, there is no mine listed among the preloaded ones (ublox ANN-MB-00-00).
Can I indicate a similar one? Which? Have a good day everyone
ANN-MB is not a calibrated antenna, means that the phase center can oscillate from sample to sample and doesn’t have a standard mounting thread, so it’s not suitable for NOAA calibration.
Each antenna is unique, and while mechanically the construction looks like it can be assembled consistently, it is not tested to meet any specific criterion. The relative phase-centers for each frequency/constellation should be reasonably consistent.
Performance will also be dependent on the ground plane/mount on to which the antenna is attached. The people that robot tested them had a mount plate with a 5/8″-11 thread so it could be fixtured properly.
Picture of the internals of the ANN-MB
Data for a materially similar antenna AMO builds, see 150 mm (6″) ground plane used to characterize performance/radiation
http://biakom.com/pdf/AGA556022-S0-A14.pdf (close match to MB-ANN, per original sample)
http://biakom.com/pdf/AGA424214-S0-A1.pdf (another using the same patch antenna)