Height offsets for non-conforming GNSS antennas

28 January 2015:
A new international standard definition of the antenna reference point (ARP) has resulted in a vertical change for two multi-configuration antennas with removable adapters or special-purpose masts. These and similar, recently added antennas are listed below to help you identify your ARP and determine your antenna height.

side view of typical non-conforming GNSS antenna

Before You Go In The Field

Refer to the antenna calibration drawings to locate the ARP for your antenna type. You will need this to properly measure your antenna height, or compute it using a slant height measurement.

After Returning From The Field

If you used one of the antennas listed below and measured only to the bottom of the adapter or optional mast, then you will need to add the length of that adapter or mast to bring the total antenna height up to the ARP. The table below provides known height offsets for some adapters or poles.

Non-Conforming Antenna Model

height offset

changed JAV_TRIUMPH-1R 0.1820 m RF mast was removed.
 
deleted JAVTRIUMPH_2 See JAVTRIUMPH_2A
changed JAVTRIUMPH_2A 0.0250 m threading change adapter was removed.
 
deleted JAVTRIUMPH_LS See JAVTRIUMPH_LSA
added JAVTRIUMPH_LSA 0.0250 m threading change adapter was not included.
 
added JAVTRIUMPH_1M ?.??? m adapter was not included.
added JAVTRIUMPH_1MR 0.182 m RF mast was not included.

 

Note:
older NGS and IGS calibrations DO include removable spacers. These few JAVAD calibrations listed above were changed because they were still recent when the 2015 standard was created. See FAQ4 for more information.