Hiper V vs Hiper V+10 antenna model with OPUS
If I understand correctly the difference between antenna TPSHIPER_V+10 and TPSHIPER_V is a 10cm adapter.
So in theory, TPSHIPER_V+10 used with a 2.000m input height should produce the same result as TPSHIPER_V used with a 2.100m height, correct?
Submitting the same file to OPUS, using both parameters, yields a difference of 0.052m between the two.
ANT NAME: TPSHIPER_V NONE # FIXED AMB: 70 / 73 : 96%
ARP HEIGHT: 2.100 OVERALL RMS: 0.016(m)
EL HGT: 137.239(m) 0.009(m) 135.968(m) 0.009(m)
ORTHO HGT: 169.298(m) 0.028(m) [NAVD88 (Computed using GEOID12B)]
(datasheet elev. is 169.404, this solution is -0.106)
ANT NAME: TPSHIPER_V+10 NONE # FIXED AMB: 70 / 73 : 96%
ARP HEIGHT: 2.000 OVERALL RMS: 0.016(m)
EL HGT: 137.291(m) 0.008(m) 136.021(m) 0.008(m)
ORTHO HGT: 169.350(m) 0.028(m) [NAVD88 (Computed using GEOID12B)]
(datasheet elev. is 169.404, this solution is -0.054)
i have had the same problem I just use the antenna option without the 10 cm adapter and it’s correct but there is for sure a problem with the antenna option with the adapter
Does the adapter give the shape of the antenna signal a different shape perhaps? I remember seeing sketches of different antennas and why it's important to note your receiver so the vertical offset is to the center of this shape. I always assumed that maybe the adapter changed that by a different amount than just 10cm but never checked it.
With the ground plane that is probably inside the antenna assembly, another piece of metal underneath should have minimal impact on the signals.
Can you use the antenna on a fiberglass or metal pole/tripod with no warning in the manual about degraded accuracy?
I also wanted to comment on the 0.052 difference in that the original poster shows as a difference between the two test runs he observed. I've printed this page a while back from the Topcon Hiper V manual and actually have handwritten the 0.0552m on the paper before this post came up and just realized that the slant mark versus bottom mount HI may be the problem?