What's new on DORIS

Sentinel-6A a new DORIS mission in orbit (dorismail 1252)

Jason-3/DORIS instrument was forced to stand-by mode on 2020/10/27 and restarted on 2020/10/29 (dorismail 1249)

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).

HY-2C launched on September 21 with DORIS on-board (dorismail 1241)

Jason-3 is back to operations. It was in Safe Hold Mode between 2020/06/16 and 2020/06/19 (dorismail 1234).

New point at Crozet Island (see dorismail 1230)

New version of the file tie vectors from DORIS to other techniques  (see dorismail 1225).

Local tie file updated (see dorismail 1224).

Both reachable through the Documents page (section "Stations")

New point at La Reunion (see dorismail 1223)

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)

OSTM/Jason-2 end of mission (dorismail 1195)

Jason-2 altimetry satellite decommissioned after more than 11 years of ocean monitoring (joint press release from CNES, NASA/JPL, NOAA, and EUMETSAT)

A new type of ground antenna is introduced in the network and named Starec D (first antenna "STKD" installed at St-John's) (dorismail 1191)
The design is similar to antenna Starec B and C but with a different center of phase and a different phase law:
- distance from DORIS reference point to phase center 2 GHZ: +453 mm
- distance from DORIS reference point to phase center 400 MHZ: -39 mm
The relevant antex file is available at ftp://ftp.ids-doris.org/pub/ids/stations/doris_phase_law_antex_starecD.txt
Information about ground antenna antex files can be found in ftp://ftp.ids-doris.org/pub/ids/stations/doris_phase_law_antex_readme.txt
NB: the file doris_phase_law_antex_starec.txt is a copy of the file doris_phase_law_antex_starecBC.txt, and is only applicable for Starec B and C.

Antenna change at St John's (dorismail 1188)

Antenna change at Kerguelen (dorismail 1185)

Jason-2 is back in nominal mode. It was in Safe Hold Mode from 2019/02/16 to 2019/05/20 at around 08:00:00 UTC. See details for DORIS data availability in dorismail 1184.

Jason3 is back in nominal mode. It was in Safe Hold Mode from 2019/04/06 at 23:17:22 UTC to 2019/04/12 at 07:00:00 UTC. See details for DORIS data availability in dorismail 1180.

SARAL/AltiKa satellite has been encountered  some issues with the Star trackers affecting the nadir pointing accuracy since 3rd of February 2019. Find information about the impacts on DORIS measurments in dorismail 1178.

Jason3 is back in nominal mode. It was in Safe Hold Mode from 2019/02/24 at 09:57:16 UTC to 2019/03/06 at 08:40:40 UTC. See details for DORIS data availability in dorismail 1175.

New version of the file tie vectors from DORIS to other techniques  (see dorismail 1173).

Also reachable through the Documents page (section "Stations").

Jason-2 has been in Safe Hold Mode since February 4, 2019, and will stay in this mode at least until 20^th of March.

During this period no DORIS data will delivered to IDS Data Centers (see dorismail 1172).

Jason-3 in Safe Hold Mode since February 24, 2019 (see dorismail 1171). 

Coordinates update at San Juan (see dorimail 1159)

Jason-2 was in Safe Hold Mode from December 26, 2018 to January 4, 2019. See details for DORIS data availability in dorismail 1158.

New site Ny-Alesund II. A new DORIS station has recently been installed in the Svalbard Islands, at Ny-Alesund II, the new geodetic Earth observatory built by the Norwegian Mapping Authority (see dorismail 1146).

Previous location, named Ny-Alesund, has been completely removed (see dorismail 1145).

Jason-2 was in Safe Hold Mode from October 19, 2018 to October 24, 2018, and a mass memory handling unit anomaly occured on October 18, 2018. See details for DORIS data availability in dorismail 1143.

New site at San Juan (see dorismail 1141)

New point at Rio Grande (see dorismail 1139)

Jason-2 in safe hold mode from 2018/07/18 09:00 TU to 2018/07/25 08:30 TU (SHM starts just after the last maneuver to place Jason-2 on i-LRO).  First cycle of i-LRO (from 2018/07/25) is numbered 600 (see dorismail 1126). See details for DORIS data availability in dorismail 1128.

Maneuvers on July 16 and 18 to place Jason-2 on an Interleaved Long Repeat Orbit (i-LRO) for the second geodetic cycle, on a ground track in the middle of the grid defined by the first geodetic cycle (see dorismail 1124 and previous dorismail 1075)

Happy Birthday Jason 2!

Today, June 20, the OSTM/Jason-2 mission (Ocean Surface Topography Mission) marks its 10^th year in orbit. (see dorismail 1117)

DORIS/Sentinel-3B switched on on May 1st.

Local tie file updated (see dorismail 1113). Also reachable through the Documents page (section "Stations")

Sentinel-3B launched on April 25th with DORIS on-board.

New point at Mangilao in the premises of the University of Guam, Mariana Islands (see dorismail 1111)

New point at Rothera (see dorismail 1108)

Data availability during last Jason-2 Safe Hold Mode (see dorismail 1105)

Antenna replacement at Sal (Cape Verde Islands) (dorismail 1091)

Data availability during recent periods of Safe Hold Mode of Jason-2: DORIS1B data and the satellite orbits are not delivered; DORIS/Rinex are disseminated to IDS (as well as the solar panel / attitude quaternions files) but with a degraded quality because of the SHM and the non-nominal attitude law (see dorismail 1087). 

Jason-2 in Safe Hold Mode since 2017/09/14 07:13:04 UTC. More information on Jason-2 status in dorismail 1080

Local tie file updated (see dorismail 1079). Also reachable through the Documents page (section "Stations")

 Jason-2 will be moved to a Long Repeat Orbit (LRO) at 1309.5 km. More information from last JSG held on June  20^th in dorismail 1075.

Antenna change at Sal (Cape Verde Islands) (dorismail 1074)

Jason-2 in Safe Hold Mode since 2017/05/17 22h26:57 UTC. More information on Jason-2 status in dorismail 1073

Jason-2 was in Safe Hold Mode from March 15, 2017 to March 29, 2017. No DORIS 2.2 data and no orbit for this period. RINEX files available during that period but with some gaps (see dorismail 1071)

New point at Socorro (see dorismail 1068)