ACSPO Global SST from ABI

SST.Team — Thu, 17 Mar 2022 15:19:53 +0000

The ABI SST data are produced from GOES-East (at present GOES-19, before 2025/04/06 GOES-16) and GOES-West (at present GOES-18, before 2023/01/10 GOES-17) satellite using the NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) v.3.0 and v290 enterprise system. Currently, near-real time (NRT) data are produced at STAR, with a ~2-6 hour latency. A Reanalysis (RAN) dataset for GOES-16 is also available. The data are available in NetCDF4 format, compliant with the GHRSST Data Specifications v2 (GDS2). Currently, the data are archived on PO.DAAC and available at this Coast Watch page as a 2week rotated buffer.

SST.Team Thu, 03/17/2022 - 11:19

The ABI SST data are produced from GOES-EAST, now GOES-19 (GOES-16 with ACSPO v2.70 before 2025/04/06) satellite using the NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) v3.00 and GOES-WEST, nowGOES-18 satellite using the NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) v2.90 enterprise system, GOES-17 (GOES-WEST) used ACSPO v2.71. Currently, for GOES-19 and GOES-18 near-real time (NRT) data are produced at STAR, with a latency of 2 to 6 hours (typically closer to 2 hours). For GOES-16 a reanalysis and reanalysis ver. 2 (ACSPO v2.90) starting 2017-Dec-15 exist. The data are available in NetCDF4 format, compliant with the GHRSST Data Specifications v2 (GDS2). The data is archived with PODAAC with start date 2019-Feb-01 and end date 2023-Jan-10 (G17W) , 2022-Jun-7 (G18W) and 2017-Dec-15 (G16E) respectively. The NRT data is also available at this Coast Watch page as a 2-week rotated buffer. There is a plan to reprocess the GOES-17 and -18 ABI data and to repeat the reprocessing of the GOES-16 data.

The data are reported hourly, in ABI Full Disk (FD), for view zenith angle not exceeding 68° in GHRSST Data Specifications v2 (GDS2) format, in swath projection (L2P) and 0.02° gridded L3C, 24 FDs per day, with a total data volume of 6.3GB/day for L2P and 0.5GB/day for L3C, respectively.

It should be noted that, due to an issue with its Loop Heat pipe, the L1b data for G17 was compromised for certain hours of the day and cannot be used to generate sensible SSTs. Therefore, SSTs from G17 was not reported for the times between 09:00 UTC and 19:00 UTC. Since this is a hardware issue it is unlikely to be resolved in the near future. (see Pennybacker et al., 2019). The new GOES-West (G18) is free from such problems.

In each valid water pixel (defined as ocean, sea, lake or river, up to 5km inland; note that in "invalid" pixels, defined as those with >5km inland, fill values are reported), the following layers are reported in both L2P and L3C: SSTs derived using multi-channel SST (MCSST; night) and Non-Linear SST (NLSST; day) algorithms (Petrenko et al., 2014); ACSPO clear-sky mask (ACSM; provided in each pixel as part of l2p_flags; Petrenko et al., 2010); SSES bias and standard deviation (Petrenko et al., 2016); NCEP wind speed; and ACSPO SST minus reference (Canadian Met Centre L4 SST). For L2P, brightness temperatures (BTs) in 3.9, 8.6, 10, 11, and 12 µm bands are also reported, for those users interested in direct "radiance assimilation" (e.g., NOAA NCEP, NASA GMAO).

Only ACSM "confidently clear" pixels (equivalent to GDS2 "quality level"=5; also reported for each pixel) should be used. The ACSM also provides day/night, land, ice, twilight, and glint flags. They may also ignore ACSPO SST and derive their own SSTs from the original BTs.

Both L2P and L3C SSTs are monitored and validated against in situ data (Xu and Ignatov, 2014) in SQUAM (Dash et al., 2010) and ARMS (Ding et al., 2017) systems, and BTs are monitored in MICROS (Liang and Ignatov, 2011).

Short Names

ABI_G16-STAR-L2P-v2.70

ABI_G16-STAR-L3C-v2.70

ABI_G17-STAR-L2P-v2.71

ABI_G17-STAR-L3C-v2.71

G18-ABI-L2P-ACSPO-v2.90

G18-ABI-L3C-ACSPO-v2.90

Temporal Start Date

December 15, 2017

Temporal Coverage

G16/EAST RAN+NRT: 2017-Dec-15 to 2019-May-07 (RAN) to present (NRT) (PODAAC)

G17/WEST NRT: 2019-Oct-16 to present (PODAAC)

G18/WEST RAN+NRT: 2022-Jun-7 to present(RAN 2 months delayed) (NRT) (PODAAC)

Product Families

Sea Surface Temperature

Algorithms:

Petrenko, B., A. Ignatov, Y. Kihai, M. Pennybacker, 2019: Optimization of sensitivity of GOES-16 ABI sea surface temperature by matching satellite observations with L4 analysis. Remote Sens, 11, 206, doi: 10.3390/rs11020206, https://www.mdpi.com/2072-4292/11/2/206/htm
Pennybacker, M., A. Ignatov, O. Jonasson, I. Gladkova, B. Petrenko, Y. Kihai, 2019, Mitigation of the GOES-17 ABI performance issues in the NOAA ACSPO SST products, Proc. SPIE 11014, Ocean Sensing and Monitoring XI, 110140Q (30 May 2019); doi:10.1117/12.2521051, ftp://ftp.star.nesdis.noaa.gov/pub/sod/osb/aignatov/SPIE/2019/Papers/PennybackerEtAl_Mitigation_G17_SST_110140Q.pdf
Ignatov, A., I. Gladkova, Y. Ding, F. Shahriar, Y. Kihai, X. Zhou, JPSS VIIRS level 3 uncollated SST Product at NOAA”. J. Appl. Remote Sens., 11(3), 032405, doi:10.1117/1.JRS.11.032405 (2017), ftp://ftp.star.nesdis.noaa.gov/pub/sod/osb/aignatov/Irina/L3U/JARS_11_3_032405.pdf

Monitoring:

SQUAM (https://www.star.nesdis.noaa.gov/sod/sst/squam/): Dash, P., A. Ignatov, Y. Kihai & J. Sapper, 2010: The SST Quality Monitor (SQUAM). JTech, 27, 1899-1917,doi:10.1175/2010JTECHO756.1
iQUAM (https://www.star.nesdis.noaa.gov/sod/sst/iquam/): Xu, F. & A. Ignatov, 2014: In situ SST Quality Monitor (iQuam). JTech, 31, 164-180, doi:10.1175/JTECH-D-13-00121.1
ARMS (https://www.star.nesdis.noaa.gov/sod/sst/arms/): Ding, Y., A. Ignatov, K. He, I. Gladkova, 2018: ACSPO Regional Monitor for SST (ARMS). GHRSTT XIX: Science Team Meeting, June 2018, Darmstadt, Germany, ftp://ftp.star.nesdis.noaa.gov/pub/sod/osb/aignatov/GHRSST/G19/Presentations/G19_Oral_ARMS_Ignatov_v02.pptx
MICROS (https://www.star.nesdis.noaa.gov/sod/sst/micros/):Liang, X. & A. Ignatov, 2011: Monitoring of IR Clear-sky Radiances over Oceans for SST (MICROS). JTech, 28, 1228-1242, doi:10.1175/JTECH-D-10-05023.1

Measurements

Sea Surface Temperature - Geostationary

Processing Levels

Level 2

Level 3

Spatial Coverage

Western Hemisphere

The ACSPO ABI SST data are provided by NOAA STAR. We strongly recommend contacting NOAA SST team led by A. Ignatov before the data are used for any publication or presentation.

Latency Groups

0 Hours <= 24 Hours (NRT)

Latency Details

NRT: 2-6 hours (in most cases closer to 2 hours)

Spatial Resolution Groups

2km+

Spatial Resolution Details

L2P: 2km at Nadir to ~12km at VZA=68°
L3C: 0.02°

Platforms

GOES-East

GOES-West

Instruments

ABI

Processing Algorithms

ACSPO

Data Providers

NOAA

NESDIS

STAR

Product DOI

https://doi.org/10.5067/GHG16-2PO27

https://doi.org/10.5067/GHG16-3UO27

https://doi.org/10.5067/GHG17-2PO71

https://doi.org/10.5067/GHG17-3UO71

https://doi.org/10.5067/GHG18-2PO29

https://doi.org/10.5067/GHG18-3CO29

Data Tool Links

Near Real-Time (NRT) [14 Day Rotated Buffer]

G18 + G19 L3C:

CoastWatch Data Portal

Sample Filenames

L2P: 20191016000000-STAR-L2P_GHRSST-SSTsubskin-ABI_G16-ACSPO_V2.70-v02.0-fv01.0.nc
L3C: 20191016000000-STAR-L3C_GHRSST-SSTsubskin-ABI_G16-ACSPO_V2.70-v02.0-fv01.0.nc

HTTPS

Near Real-Time (NRT) [14 Day Rotated Buffer]

G18 L2P/L3C:

https://coastwatch.noaa.gov/data/pub0014/coastwatch/sst/nrt/abi/g18/

G19 L2P/L3C:

https://coastwatch.noaa.gov/data/pub0014/coastwatch/sst/nrt/abi/g19/

Reanalysis ver. 2 (RAN2) [2 months delayed]

G16 L2P/L3C:

https://coastwatch.noaa.gov/data/pub0014/coastwatch/sst/ran/abi/g16/

THREDDS

Near Real-Time (NRT) [14 Day Rotated Buffer]

G18 L2P: