Stonex S9III Plus GNSS Receiver – User Manual
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received data packets. In the same way using built-in radio UHF light will flash.
4.3. How to measure the antenna height
The height of receiver is 99mm, the diameter is 186mm, the height from the
center of the sealed rubber ring to the bottom is 62mm and the height from
the phase center to the bottom is about 88 mm for L1 frequency and 91.5 mm
for L2 frequency.
The antenna height is conventionally defined as the vertical height from the
phase centre to the ground surveyed point (the distance “h” in fig. 4.5).
It is not possible to measure it directly: you have to measure other reachable
heights (the distances “a”, “d”, “s” in fig.4.5).
The distance “a” is the vertical height from the ground to the mainframe’s
bottom, “d” is the vertical height from the ground to the middle of the rubber
ring: both are defined as “vertical heights”. On the contrary the distance “s” is
measured from the ground surveyed point to the middle of the rubber ring
and is called “slant height”. You have to choose the measuring method
according to the used software:
Fig. 4.5 - Different measures of the antenna height for S9 III PLUS
1. In rover and base mode you have to insert the correct antenna height
according to RTK software. In STONEX® SurvCE, for example, the distances “a”
and “s” are permitted: software will add the distance “b” to “a” (or convert “s”)
to obtain “h”. For other software please read the specific user guide.
2. In static mode you have to write the correct antenna height in .DAT or RINEX
file. If you are using STONEX® GPS Processor you have to specify the correct
antenna height before processing .DAT data or exporting it into RINEX format.
