New point at Kerguelen (KEZC)
The DORIS antenna at KERGUELEN Islands (French Southern and Antarctic Lands) has been replaced in order to overcome recurrent power loss and disruption on the 400MHz channel for a year (see dorismail 1440).
New point at Le Lamentin (LAPB)
The DORIS station at LE LAMENTIN (French West Indies) has recently been moved to the ground some 70m northeast in order to provide a better environment for the antenna (see dorismail 1438).
New version of the file tie vectors from DORIS to other techniques (see dorismail 1434).
New tandem phase between Jason-3 and Sentinel-6 MF:
Jason-3 is returning to a tandem phase with Sentinel-6 MF during 4 months in 2025. A series of orbital maneuvers is being performed beginning on January 7, 2025, for about 3 weeks to allow Jason-3 to reach the orbit of Sentinel-6 MF and fly behind it with a one minute delay (see DORISmail 1422).
ITRF 2020 onboard DORIS
The terrestrial positions-velocities calculated on board by the DIODE navigator are therefore expressed in ITRF2020 (see DORISmail 1423).
New point at Owenga (OWGC):
The DORIS station at Owenga (Chatham Island, New Zealand) was replaced following a breakdown last July (see DORISmail 1424).
New site at Ulaanbaatar (ULAC):
A new DORIS station has recently been installed in Ulaanbaatar, Mongolia
(see dorismail 1406)
New point at Male (MAMC).
The DORIS antenna at MALE has been replaced in order to overcome signal power loss and disruption since late December 2023 (see dorismail 1400).
Local tie file updated.
New point at Höfn (HOGC).
The DORIS antenna at HOFN has been replaced in order to overcome power loss and disruption over the past few months (see dorismail 1392).
New point at Crozet (CRRC).
The DORIS antenna at CROZET has been replaced in order to overcome recurrent power loss and disruption (see dorismail 1385).
New point at Rothera (ROBC).
The DORIS station at ROTHERA (Antarctica) is back to operation after a year outage due to a problem with the routing of the spare equipment. The antenna was replaced (see dorismail 1384).
New point at Rikitea (RIMC).
New point at Gavdos (GAVC)
After a first occupation from 2003 to 2014, DORIS is back to Gavdos Island in Crete, Greece.
A new DORIS station has recently been installed at the new ESA Permanent Facility for Altimetry Calibration (GVD1 Cal/Val site) in Gavdos Island (see dorismail 1367).
New version of the file tie vectors from DORIS to other techniques (see dorismail 1369).
New point at Santa Cruz (SCSC)
The DORIS station at SANTA CRUZ, Galapagos, Ecuador was recently upgraded with 4th generation beacon and Starec C antenna (see dorismail 1358).
New point at Nouméa (NOXC)
The DORIS station at NOUMEA (New Caledonia, South Pacific) was recently upgraded with 4th generation beacon and Starec C antenna (see dorismail 1343).
New point at Futuna (FUUC)
The DORIS station at FUTUNA (French overseas collectivity, South Pacific) was recently upgraded with 4th generation beacon and C antenna, and has been back to operation after more than 2-year outage (see dorismail 1339).
New point at San Juan (SJVC)
The DORIS station at SAN JUAN (Argentina) was recently upgraded with 4th generation beacon and C antenna, and has been back to operation after a 2-year outage.(see dorismail 1323).
Jason3 on interleaved orbit.
A series of maneuvers beginning on April 7, 2022 placed Jason-3 in an interleaved orbit with Sentinel-6 Michael Freilich which became the new Reference Altimetry Mission from that date (see dorismail 1139).
New point at Male (MALC).
The DORIS station in Maldives was completely renovated in order to better meet the DORIS system requirements. The antenna was moved to a new support 27 m northeast and the whole equipment was changed (see dorismail 1292).
New point at La Réunion (see dorismail 1285). The DORIS station equipment has been replaced in order to overcome recurrent power loss and disruption. The position of the antenna reference point slightly changed.
Local tie file updated (see dorismail 1280).
HY-2D launched on May 19 with DORIS on-board (dorismail 1279)
New point at Kerguelen (KEYC):
Following required modification in the antenna support of the DORIS station at KERGUELEN Islands (French Southern and Antarctic Lands), the position of the antenna reference point shifted slightly. (see dorismail 1278)
New site Höfn.
A new DORIS station has recently been installed at Höfn (Iceland), in the geodetic observatory of the National Land Survey of Iceland (LMI) (see dorismail 1246). This new station replaces the former DORIS station of Reykjavik (see dorismail 1247).
HY-2A DORIS data are no longer distributed since September 12. Since June 11, the satellite has been in "orbit maintenance mode" with all payloads on board stopped (altimeter, radiometer...), except DORIS which remained on. Then, on September 11, NSOAS stopped the distribution of DORIS data (see dorismail 1243).
Jason-3 is back to operations. It was in Safe Hold Mode between 2020/06/16 and 2020/06/19 (dorismail 1234).
DORIS 30th anniversary (dorismail 1217)
The DORIS system is 30 years old in February 2020, 30 years of continuous operations at the heart of the of altimetry mission performance for oceanography and geodetic applications. Read more here.
Jason-3/DORIS data interruption due to Safe Hold Mode between 2020/01/31 and 2020/02/12 (dorismail 1220)
Erratum Ground antenna types; the name STAREC D is abandoned.
Following new measurements in the anechoic chambers it appeared that the antennas that were named STAREC D have exactly the same characteristics as the antennas named STAREC C.
As a consequence, the antex starec D phase law file doris_phase_law_antex_starecD.txt is removed and the related documents are corrected.
More details in dorismail 1202 (cancels and replaces the previous dorismail 1191)
Antenna change at St John's: the dorismail 1204 cancels and replaces the previous dorismail 1188
New point at Santa-Cruz (see dorismail 1207)
