ggsps status

03-May-2007 GIST 26: Abingdon

GGSPS status

Andy SmithRAL


Outline

• Edition 1 release and reprocessing• Operations: GERB-1 and 2 archive stats,

problems• Progress on new development• Future work


Reprocessing & release

Status at last GIST meeting:• L2 ARG June 2006 to present released• L1.5 NANRG 2004-5 reprocessing proceeding

slowly• Concerns about QA effort and delay to release


Reprocessing & release

Reprocessing• L1.5 2004-5 reprocessing & QA completed Jan 07• Met new timescale agreed at last GIST

Release of the L1.5 NANRG• Oct 2005 to present released Jan 07• 2004-5: rolling release

– needs L1.5 geo data from RMIB L2 reprocessing

• “Wash-up” tasks: re-order of missed L0 data for 2004-5 to give more complete Edition 2 data set


Edition 1 data available

All L1.5 data reprocessed: 2 years’ data available18 months’ L2 ARG data available for download

Product Available Remaining

L2 ARG 28-Mar – June 200429-Oct-2005 – (today – 40d)

Oct 04 – Oct 05

L15 NANRG

16-Feb – June 200429-Oct-2005 – (today – 40d)

Oct 04 – Oct 05


Special data sets

Excluded from Ed01, available separately via GGSPS web pages

• L2 ARG Feb-March 2004 (clear-sky warm-up)• L1.5 1-16th Feb 2004 (pre TSOL jitter)Both above include Ernesto’s Feb 04 validation

period

Ops team only:• L2 solar eclipses March, Sept 2006• L2 data affected by counting data (several

periods)


Ops: G2 archive stats

Mon

% L0

% L0 normal

% L1.5 Ed01

Outages

Oct 85.3 62.6 97.6 MSG off 14.6%, sunblock 16%, nightly sun avoidance

Nov 93.8 99.5 85.1 Data corruption 6%, ROM, stray light

Dec 99.9 99.7 94.6 Counting data x2

Jan 99.8 99.9 93.7 Counting data x2

Feb 99.9 85.4 91.7 Sun avoidance, leased line, stray light

Mar 90.9 64.6 98.0 Data corruption 8.8%, sun avoidance, auto-sunblock x4, sunblock during corrupt.

Apr 96.5 69.8 87.6 Leased line x2 6.5%, RAL power, sun av, auto-sunblock x4


Ed01 data coverage

Reduced Ed01 data coverage:• Mirror events: counting data (~1 day)• Direct stray light close to midnight (hours)• High % of corrupt/missed packets (hrs/days)• Quartz Filter anomaly (1 or 2 products)• Mirror pointing anomaly (1

product)• Sensor swaps (1 product)

Products picked up in QA are “pulled” from Edition 1(GERB-1 products not pulled – no data released)


Ops: G1 archive stats

Mon % L0 % L0 Norm

% L1.5

Outages

Oct 61.9 0 - Data corrupt 36.2%, ROM 1.7%

Nov 96.7 0 - ROM 2.3%, EUM maintenance

Dec 95.0 0 - PGS Antenna 4.97%

Jan 99.9 72.8 99.9

Feb 99.9 40.3 98.7 SAFE after 12-Feb, leased line 1.5% (re-ordered since)

Mar 99.3 0 - PGS antenna 0.7%

Apr 94.5 33.2 98.2 RAL power, leased line x2 >5%


Ops: problems

Problems affecting L0 data and NRT processing:• Satellite off & instrument data corruption• PGS antenna, EUM maintenance • RAL power & local network• RAL-EUMETSAT leased line

– high impact, only partially under our control:

– can be intermittent, packet %ages don’t reflect number of affected products

– move to SFTP over internet may solve this (and may introduce new problems)


Operations

GERB-2 catalogue database• L0 table large, performance problems• Created difficulties in processing backlogs of

data after outages • Tables split into current/historic to reduce

impact

Software:• Corrupt data and intermittent line breaks

revealed new data handling bugs


New development Oct - April

• Oct – Feb: reprocessing• Feb – Apr: ongoing Release & (dual) Ops work…

• Initial planning of Linux port, bid submitted• Ported system needed for GERB-3, but funding

constraints may require work completed much sooner

• SFTP of L0 data from EUMETSAT to RAL• TSOL jitter data in GERB packet


Future work

• SFTP of L0 data & TSOL jitter data in GERB packet – ~4 months to complete

• Linux port: ~1 staff year• Possible L1.5 processing improvements: MB

talk• Further product releases: L2 BARG etc• Level 2 Monthly Means

ggsps status

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