CRTN Stations

CRTN Status Map (updated continuously)

News 12/06/2025: New CRTN Excel worksheet All coordinates in NAD83(2011). New DWR stations Q102,Q122,Q164; New CTSRN stations: PGRV, PDLR, AZYA

News 08/18/2025: New CRTN Excel worksheet - all stations in southern California are now streaming data from the new CRTN server at 132.239.152.4 with Epoch 2025.00 coordinates. For users of San Diego County stations, please discontinue use of 132.239.154.80:2103

News 08/11/2025: Migration to Epoch 2025.00 coordinates - new CRTN Excel worksheet

News 07/31/2025: New CRTN Excel worksheet Migrated to new server with new IP and port numbers (see below)

Important News 7/30/2025: Due to rapidly changing circumstances, we have consolidated all four CRTN zones under one IP=132.239.152.4. This only affects users in zones 1-2 and 6. Here is the new list:

Northern California, Zones 1-2:  132.239.152.4:2102 (updated 07/30/25)

Northern California, Zones 3-4:     132.239.152.4:2103 (No change)

Southern California, Zone 5:          132.239.152.4:2104 (No change)

Southern California, Zone 6:       132.239.152.4:2105 (updated 07/30/25)

Note: The CRTN Status Page is not accurate - will be fixed shortly

Please contact Maria Turingan (mrturingan@ucsd.edu) for account or access issues

Thanks for your understanding

News 4/10/2025: New CRTN Excel worksheet (1) Add new DWR stations HANF,Q174,Q213 with CSRS Epoch 2017.5 coordinates; (2) Moved DWR stations MABY,R108,YCFC to zone 1-2; (3) Fixed server and zone headers

News 3/7/2025: New CRTN Excel worksheet (1) Updated IP/port numbers for CRTN Zone 5 and Zone 3-4; (2) Added new Department of Water Resources stations (MABL,R108,YCFC); (3) Caution: added comment on a subset of stations that have different Epoch 2017.5 NAD83(2011) coordinates - see column T in spreadsheet]

News 10/5/2024: Updated Station Excel Worksheet -Added DWR stations Q143,Q160,TLBN; Disconnected rebuilt BARD (see below) stations until approximate coordinates are updated.

News 8/27/2024: Updated Station Excel Worksheet - Added rebuilt and renamed BARD stations, changed "USGS" designation to "SCGN", "USGS MP" to "NCGN"; All BARD stations transmit GPS and GLONASS signals.

Caution: The rebuilt stations only transmit approximate coordinates. not CSRS 2017.5, except for former NOTA stations (P259,P218,P238,P251,P236) which have only been renamed and maintain their CSRS 2017.5 coordinates.

News 8/5/2024: Updated CRTN Station Excel Worksheet; Added DWR stations (HWPP, TULA) and updated subnet codes (columns H-I)

News 6/12/2024: Updated CRTN Station Excel Worksheet; Removed stations no longer in operation; Added Caltrans CTSRN stations: ATVL, MDPN, CHTH, B405, BCTY, OLNA, FNT8 with the assistance of Eric Adney and Bryan Banister at Caltrans

        [Caution: A subset of (CTSRN) stations have 2019.55 coordinates rather than CSRC Epoch 2017.5 - see column S in spreadsheet]

News 3/13/2024: Updated Station Excel Worksheet; Removed stations no longer in operation; Added DWR stations Q189, Q204, Q208) and Verquin station GZKA; Removed BARD stations that were moved to new locations - they do not have 2017.5 coordinates yet.

        [Caution: added comment on a subset of (CTSRN) stations that have 2019.55 coordinates rather than Epoch 2017.5 - see column T in spreadsheet]

News (02/22/2023): Updated spreadsheet with station GNSS upgrades, including 12 Caltrans Spatial Reference Network (CTSRN) GNSS stations

(Courtesy of Eric Adney and Bryan Banister)

News (10/21/2021): Updated spreadsheet with 30 GNSS upgrades (GPS+GLONASS) and 7 Caltrans stations.

News (6/29/2020): We've added 89 stations in southern California - 55 in Zone 5 and 24 stations in Zone 6. These data are from the U.S. Geological Survey (USGS) with the data coming through the UNAVCO NOTA server. Thanks to USGS and UNAVCO for facilitating access to these data.

News (11/28/2019): Added 11 Caltrans CVSRN and CCSRN stations with GNSS availability (courtesy of Eric Adney and Bryan Banister). There are now a total of 606 CRTN stations, with 244 GNSS.

News (9/17/2019): Added upgraded NOTA/PBO real-time stations bringing the total number of CRTN stations to 584, with 193 GNSS stations. This fills the gap in the Los Angeles area (see CRTN maps). We plan to include the 91 USGS SCIGN stations when data become available in RTCM3 format.

On July 31, 2025, the CSRC published a new geodetic datum for California called “CSRN Epoch 2025.00 NAD83 (2011)” under a Caltrans contract to SIO/SOPAC. The new NAD83(2011) epoch-date coordinates are transmitted by CRTN with RTCM 3.3 data streams starting August 11, 2025.