Update #1: The first two fuel depletion maneuvers we
performed as scheduled on April 6th, 8th and 9th, resulting in
degraded sea surface height measurements. A station keeping maneuver
was executed at 02h02m07s Z on April 10th with a small decrease of
-40.5m (instead of the third depletion maneuver). This maneuver also
resulted in degraded sea surface height measurements. Additional
maneuvers and degraded sea surface height measurements can be
expected over the next several days.
Topic: Jason-2 Depletion Maneuvers
Date Issued: Issued April 10,
2018 - 1240Z
Product(s) or Data Impacted:
Jason-2 Operational Geophysical Data Records (OGDRs)
Date/Time of Initial Impact: April 6, 2018 0054Z
Date/Time of Expected End: April 17, 2018
Length of Event: TBD
Details/Specifics of Change:
A number of Jason-2 fuel depletion maneuvers are scheduled from
April 6 to April 17, 2018. The first two maneuvers are scheduled for
April 6 and April 8-9, 2018. The exact times of the remaining
maneuvers will be given in later updates.
1st maneuver: The first burn will occur on April
6 at 00h54m32s Di = +0.01846\xB0 with a duration of 586.5s Dv =
2.29m/s. The second burn will occur at 06h29m58s Di =-0.01846\xB0
with a duration of 598.13s Dv = -2.29m/s.
2nd maneuver: The first burn will occur April 8 at
23h49m30s. The second burn will occur on April 9 at 05h25m02s.
3rd maneuver: April 10th (exact time given later)
4th maneuver: April 11th (exact time given later)
5th maneuver: April 12th (exact time given later)
6th maneuver: April 13th (exact time given later)
7th maneuver: April 17th (TBC according to the remaining
fuel)
The maneuvers will be performed mostly, but not completely, over
land. Sea surface height measurements from telemetry during the
maneuvers is expected to be degraded. In addition, products could be
impacted 30 minutes before each maneuver and up to 2 hours following
each maneuver. Wind and wave content in the products will not be
impacted.
Contact Information for Further Information: ESPC Operations
at ESPCOperations@noaa.gov
and 301-817-3880
Web Site(s) for applicable information: N/A
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