[Geomag-daily] fluxgate replacement at Sitka Observatory
Finn, Carol
cafinn at usgs.gov
Wed Jul 11 13:16:53 UTC 2018
USGS Geomag Data Users:
This is a notification of an impending modification to the Sitka
Geomagnetic Observatory (SIT) data.
Geomag Observatory: *SIT*
Start Date/Time: 07/11/2018 – 16:00:00 UTC
This modification is: planned
NOTES: The fluxgate sensor at the Sitka observatory, near Sitka, AK, will
be replaced. This requires a break in real time data continuity, and may
result in a brief interval of corrupted raw data in the archive (this will
be flagged and removed in subsequent definitive processing, as per usual).
More relevant to real-time data users is that certain derived products
cannot be reliably generated until the new instrument has stabilized
magnetically, and several absolute calibration measurements have been
performed over the course of a few days to weeks following this operation.
The table below details the effects and timelines of this modification on
various geomagnetic data and geomagnetic data products.
Product
Effect
Estimated Start Date/Time:
Estimated End Date/Time:
Notes:
Raw
Offsets/Drift/
Disturbance
7/11/2018
16:00 UTC
7/13/2018
01:00 UTC
allow ample time for hardware swap-out
Quasi Definitive
Possible Outage
7/11/2018
16:00 UTC
7/16/2018
01:00 UTC
reliable calibration required
Definitive
Possible Outage
7/11/2018
16:00 UTC
7/16/2018
01:00 UTC
reliable calibration required
Adjusted
Outage
7/11/2018
16:00 UTC
7/20/2018
01:00 UTC
multiple stable calibrations required
XYZ
Offsets
7/11/2018
16:00 UTC
7/20/2018
00:00 UTC
multiple stable calibrations required
SQ
Offsets/
Drift
7/11/2018
16:00 UTC
8/16/2018
00:00 UTC
~30 Day filter within algorithm
SV
Offsets/
Drift
7/11/2018
16:00 UTC
8/16/2018
00:00 UTC
~30 Day filter within algorithm
DIST
Offsets/
Drift
7/11/2018
16:00 UTC
8/16/2018
00:00 UTC
~30 Day filter within algorithm
DST
NA
Not a DST Station
Additional notification will be sent once real-time data products have been
fully restored to normal operation. Please direct any questions or
concerns to geomag-data at geohazards.usgs.gov.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://geohazards.usgs.gov/pipermail/geomag-daily/attachments/20180711/b91e17c6/attachment-0001.html>
More information about the Geomag-daily
mailing list