12/10/2014
L1
L2
IGS - PCO
Note: IGS Phase Center Offset locations
added for illustrative purposes
17
Appendix B - TRIUMPH-2 AntCal
For further reading on this general subject, please see the
excellent National Research Institute of Astronomy and
Geophysics (NRIAG) article:
Influence of GPS antenna phase
center variation on precise positioning
, by Dr. Ahmed I. EL-Hat-
tab which appeared in NRIAG Volume 2, Issue 2, December
2013, Pages 272-277.
Measuring your HI
Beginning with the new standardized
ARP definition, all antenna heights are
to be measured to the lowest non-re-
movable part of the antenna. This
means that, for example, using a 2-me-
ter fixed-height GPS pole, the correct
HI will reflect the addition of the 25 mm adapter; i.e., 2.025
m. If the
TRIUMPH-2
is setup on a standard tripod, measure
the slant height from the mark to the green triangle on the
side.
OPUS kindly reminds users of non-conforming antennas
like the
TRIUMPH-2
and the
TRIUMPH-LS
that the adapter must
be added.
Please refer to the
webpage for addi-
tional information.
