WASHINGTON

Station summaryUSN7

Showing all stations within 1000 km of the observed station Active station No data for 30 days Decommissioned No observations in SONEL (Survey) Not co-located with observed station
Showing all stations within 1000 km of the observed station Available data / Station OK Available data / Problem(s) detected Does not work No longer exists Foreign partner management Not co-located with observed station
Showing all stations within 1000 km of the observed station Co-located with observed station Not co-located with observed station
  • More informations on each symbol.
  • GPS Tide Gauge DORIS
IGS-type acronym : USN7
Latitude : 38.92056600
Longitude : -77.06627700
Installed date : 2014-11-12
Decommissioned date :
Country : U.S.A.
City : WASHINGTON
Station status : active (green)
Distance to Tide Gauge (m) : 6500
Domes Nr.: 40451S009
Station operator: (USNO) - U.S. Naval Observatory
IGS-like station form :

Data available at SONELUSN7



Quality plots on RINEX filesUSN7

Quality plots on RINEX files of USN7 Quality plots on RINEX files of USN7 Royal Observatory of Belgium

Plots generated using software developed with the EPN team at ROB
Observations & tracking performance Satellite tracking

informations (this operation may take 20 to 45s)

The satellite tracking graph has been calculated for all stations for the first day of each month. If you wish to have a graph for another date, choose the 'Calculate a specific date' option.

Log bookUSN7

[IGSSTATION-7117] - 2017-09-06 (19/09/2017)

Please be advised, due to cable change at USN7(USNO, Washington D.C.), new delay calibration values are being applied to RINEX data starting 2017.230. The publication of data will resume shortly. Please check the sitelog for details.

[IGSSTATION-6848] - 2016-11-10 (15/11/2016)

On 2016-11-06, stations equipped with Ashtech Z12T receivers (AMC2, MAD2, USN7), experienced an erroneous week rollover event (receiver reporting GPS week of 898 instead of 1922) which led to the following data outages.


USN7 data outage from 2016-11-06T00:00Z - 2016-11-06T13:59Z, with some intermittent outages between 2016-11-06T14:00Z - 2016-11-07T17:59Z.



Data publication for these stations has resumed.

Co-located instrumentsUSN7