TCCON Site Status Summary as of April 1, 2026, 10:55 p.m. (UTC)

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A machine parsable version is available, but we recommend using our JSON API instead.

A list of recent status updates is available as well.

How to interpret a site's status

First, look at the "Operational?" column.

If the status was "Yes" or "Intermittent", check the "Typical Non-Operational Days" and "Planned Non-Operational Dates" columns. These columns will tell you, days of the week or date, respectively, that the site will not take data. These work together, so if a site listed "Sat Sun" for days and "2025-12-25 to 2025-12-26", then it will not take data on Saturdays, Sundays, or the 25th and 26th of December, 2025. Note that you should interpret these days and dates in local times for the site.

Note that date ranges in the "Planned Non-Operational Dates" column are not shown on this page once they are in the past.

Site status table

Site ID Site Name Operational? Description/reason Last updated by Last updated on Typical
Non-Operational
Days		 Planned
Non-Operational
Dates
Update History ?1 Poker_Flat No Hoping to be operational in Summer 2016 dwunch July 2, 2015, midnight
Update History ae Ascension_Island No Solar tracker dome failed. Unclear how this can be fixed under the current Covid-19 restrictions. dfeist Aug. 13, 2020, midnight
Update History an Anmyeondo Yes Changed the manager JunOhBu May 13, 2025, 10:46 p.m.
Update History bi Bialystok No Dismounted on 2018/10/01. System will be moved to Cyprus/Greece, first measurements expected in February 2019 christof Oct. 1, 2018, midnight
Update History br Bremen Yes Operational m_buschmann July 9, 2024, 3:59 p.m.
Update History bu Burgos No There is an error for the FTS, even though the He-Ne laser is locked. morino Feb. 25, 2026, 2:09 a.m. Sat Sun
Update History cb CHARS Yes suntracker issues mostly fixed, motors can still seize up but we have a method for getting them going remotely. orfeo March 24, 2026, 3:46 p.m.
Update History ci Caltech Yes coleen Feb. 25, 2026, 7:15 p.m.
Update History ck Calakmul Yes Newly installed in November 2023 grutter Aug. 20, 2024, 2:54 a.m.
Update History db Darwin No Compressor for tracker cover not working. Waiting for site tech visit nmd03 Feb. 8, 2026, 10:37 p.m.
Update History df Dryden Yes Operational after 4 day power outage. podolske Jan. 12, 2026, 11:26 p.m.
Update History et East_Trout_Lake Yes dwunch Dec. 17, 2025, 4:55 p.m.
Update History eu Eureka No Shut down for polar night (late October to late February) strong Nov. 20, 2025, 10:38 p.m.
Update History fc Four_Corners No The instrument has been packed for shipping to Manaus, Brazil. rodica March 20, 2014, midnight
Update History gm Garmisch Yes markus.rettinger June 28, 2022, 8:56 a.m.
Update History hf Hefei Yes operational ChanggongShan April 12, 2022, 1:05 a.m.
Update History ht Arrival_Heights No As noted by Vanessa Sherlock, 27 Sept 2008 dwunch Jan. 22, 2009, midnight
Update History hw Harwell Yes Electricity back on. Observatory up and measuring on this sunny day. RAL_Spectroscopy Feb. 18, 2025, 9:25 a.m.
Update History if Indianapolis No IFS125 and IFSloopshutdown for packing and shipping to JPL podolske Dec. 10, 2012, midnight
Update History iz Izana Yes Normal mixed NIR-MIR operation ogarciar July 9, 2024, 4:14 p.m.
Update History jc jpl01 Replaced/Retired Site status set to retired/replaced to support backend changes j_laughner March 20, 2023, 4:35 p.m.
Update History jf JPL Replaced/Retired Site status set to retired/replaced during migration - new abbreviation found admin July 24, 2017, midnight
Update History js Saga Yes Operational since Nov15, 2022 after new laser setup, sun-tracker mirrors replacement, protective glass cover removal from sun-tracker k_shiomi Dec. 8, 2022, 2:45 p.m.
Update History jx JPL No Shut down to return container to NASA Armstrong coleen May 14, 2018, midnight
Update History ka Karlsruhe Yes Tracker problems fixed, new computer running Win11 installed frank.hase Aug. 12, 2025, 3:51 p.m.
Update History lh Lauder Replaced/Retired Site status set to retired/replaced during migration - new abbreviation found admin Jan. 11, 2011, midnight
Update History ll Lauder Replaced/Retired Site status set to retired/replaced during migration - new abbreviation found admin Oct. 18, 2018, midnight
Update History lr Lauder Yes Normal operations dave.pollard Jan. 28, 2026, 10:44 p.m.
Update History ma Manaus No The system is down dubey Sept. 14, 2015, midnight
Update History ni Nicosia Yes Tracker cables replaced and measuring! c_rousogenous Nov. 25, 2025, 8:36 a.m.
Update History ny Ny-Alesund Yes Operational m_buschmann July 9, 2024, 3:58 p.m.
Update History oc Lamont Yes Sun tracker remains finicky, but operational coleen Feb. 25, 2026, 7:16 p.m.
Update History or Orleans Yes Operational christof Aug. 1, 2025, 7:57 a.m.
Update History pa Park_Falls Yes Measurements have resumed! coleen March 27, 2026, 7:22 p.m.
Update History pr Paris Yes Normal Operation pascal.jeseck Sept. 22, 2025, 1:55 p.m.
Update History pv Porto_Velho No Aperture wheel is not working properly. m_sha Aug. 28, 2024, 1:19 p.m.
Update History ra Reunion_Island Yes Fixed the problem with solar tracker m_sha Dec. 8, 2024, 8:54 p.m.
Update History rj Rikubetsu Yes 1, 7, 8, 14, 15, 20-22, 28, 29 March are not operational due to holidays morino March 3, 2026, 4:52 a.m. Sat Sun
Update History so Sodankyla Yes Operational rigel.kivi Oct. 24, 2024, 10:59 a.m.
Update History tk Tsukuba Yes 1, 7, 8, 14, 15, 20-22, 28, 29 March are not operational due to holidays morino Feb. 25, 2026, 2:07 a.m. Sat Sun
Update History we Jena No FTS has been transported to Ascension Island in April 2012 dfeist Feb. 18, 2013, midnight
Update History wg Wollongong Yes nmd03 Feb. 8, 2026, 10:38 p.m.
Update History xh Xianghe Yes minqiang Sept. 1, 2023, 10:33 a.m.
Update History yk Yekaterinburg No Atmospheric transmittance spectra under clear sky conditions in Kourovka were measured in July, August and September 2009 and March 2010. dwunch Oct. 18, 2011, midnight
Update History zs Zugspitze Yes markus.rettinger June 28, 2022, 8:56 a.m.