|
 |
|
|
DORIS SYSTEM APPLICATIONS |
|
HIGH-PRECISION GEODESY | |
|
|
Reference network in French Polynesia
"SHOM, the French Navy's hydrography and oceanography department, in partnership with IGN, the French mapping and survey agency, used DORIS to set up a geodetic reference network in French Polynesia. Teams determined 13 critical station locations to within less than 10 cm and referenced them to the ITRS world geodetic system. In comparison, the local systems on the islands only offered accuracy in the region of several hundred meters".
|
| Geodetic tying: Terra Nova Bay (Antarctica) "Terra Nova Bay (TNB) is an Italian scientific base on Victoria Land in the Antarctic. We use GPS to monitor surface deformation caused by Mount Melbourne, an active volcano 40 kilometers from the base. Two months of DORIS measurements in 1995 provided the accuracy needed to tie the local network to the ITRF. The base has a permanent GPS receiver and a tide gauge, and will soon be part of the IGS and GLOSS networks. We would also like to make the TNB base a permanent DORIS observation site." Alessandro Capra, in charge of the geodesy part of the Italian Research Program in Antarctica at the University of Bologna. |
|
| Calibrating TOPEX/POSEIDON altimeters "CNES has selected and validated a calibration site in the Mediterranean for the TOPEX/POSEIDON mission, equivalent to the US Harvest site off the Californian coast. We used satellite laser ranging (SLR), GPS and DORIS over several months to obtain very precise coordinates of two reference points, one of which is near the satellite ground track and near a tide gauge. We plan to repeat this experiment for the Jason mission." Yves Menard, in charge of the TOPEX/POSEIDON calibration program at CNES. |
Photos credits :
|
 |
 CONTENTS |
| Copyright © 1999-2011 CLS. All rights reserved. | Latest Update: 1999/12/02 |
