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GOES User Information and DocumentsGOES-16 Product Maturity Levels (3/1/17)The evolving calibration and validation (cal/val) maturity of the Geostationary Operational Environmental Satellite R-Series (GOES-R) products is described by three levels: Beta, Provisional, and Full validation. Once Beta Maturity of the L1b products is achieved, the Level 2+ (L2+) will progress toward Beta maturity. Further levels of maturity (Provisional and Full validation) require additional activities that can continue over a longer time period than the Beta validation process. A detailed description of the three product maturity levels is given in Table 1. The three maturity levels are:
Table 1. GOES-R Product Validation Maturity Levels.
GOES-R Product (L1b and L2+) Maturity Level
Beta Validation
Preparation Activities
Provisional Validation
Preparation Activities
Full Validation
Preparation Activities
The assessment and declaration of a product’s maturity level is performed during the Peer Stakeholder–Product Validation Review (PS-PVR). At each PS-PVR, the status of the products will be presented by members of the cal/val science teams. For L2+ products, Beta maturity PS-PVRs are held in close proximity with and prior to Operations Handover. Status of GOES-16 ABI L1b and CMI Data (7/7/17)The GOES-R Peer Stakeholder - Product Validation Review for ABI L1b and CMI Provisional Maturity was held on June 1, 2017. As a result of this review, NOAA has confirmed that the ABI L1b and CMI data are at Provisional Validation Maturity as of June 1, 2017. Several remaining means of GOES-16 distribution will be activated the week of July 10-14, including additional PDA subscriptions, HRIT/EMWIN, and GEONETCast Americas (GNC-A). Specific dates and times for data distribution through these means will be provided via separate ESPC notifications. The ABI L1b data products are calibrated and geo-located radiances of the 16 ABI bands over the Full Disk (FD) of the Earth, the Continental United States (CONUS) region, the Mesoscale (MESO) regions, and certain instrument calibration and engineering data. The CMI data products are reflectances for bands 1-6 and brightness temperatures for bands 7-16. Provisional validation means:
Users of the GOES-16 ABI L1B data bear responsibility for inspecting the data and understanding the known caveats prior to use. Below is the list of caveats that have been identified and are under analysis. Solutions are in development and testing:
For CMI, all the caveats noted above for the radiances are valid, in addition to the following:
Advisory on Use of GOES-16 Data Products (7/7/17)While the GOES-16 ABI L1b and CMI data have reached provisional validation, the data from GOES-16 are still considered preliminary and are undergoing validation testing. NOAA is therefore requesting that any organizations that redistribute GOES-16 data -- before it is declared operational -- include the following disclaimer with the data: "NOAA's GOES-16 satellite has not been declared operational and its data are preliminary and undergoing testing." Users receiving these data through any dissemination means (including, but not limited to, PDA, GEONETCast Americas, HRIT/EMWIN, and GOES Rebroadcast) assume all risk related to their use of GOES-16 data and NOAA disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. ------------------------------------------------------ It is expected that GOES-16 data will be declared operational, approximately 6-12 months after launch, which occurred in November 2016. A new Sensor Processing System (SPS) software was released on 4/21/2014 for GOES-15 and 4/22/2014 for GOES-13. The new SPS release 10.4.1 replaces version 10.2 and corrects the following issues observed with GOES-13/14/15 imagers and sounders. GOES-15 Sounder Short-Wave striping. This problem was observed during GOES-15 Post-Launch Testing (PLT) and was discovered to be due to detector-to-detector and line-to-line (East to West vs. West to East) differences. The correction algorithm corrects both problems in real-time (line by line). More detail can be found in the paper, "A Real Time De-Striping Algorithm for Geostationary Operational Environmental Satellite (GOES) P Sounder Images" by Zhenping Li, and images in the presentation "GOES15 Sounder Destriping Correction" by University of Wisconsin scientists. GOES-13 IR Channels 2 (3.9 um) and 4 (10.7 um) registration difference was discovered to be 1 pixel or greater at certain times of day. This can cause false fog data which uses the difference between these two channels. A registration correction algorithm was developed into SPS v10.4.1 which shifts one of these channels towards the other based on whichever is closer to visible channel. When channel-2 needs correction it is shifted one full pixel whenever the difference is more than 0.5 pixel. When channel-4 needs correction (GOES-14), the data are resampled to make full correction so the two channels registration better match. More detail can be found in the paper, "GOES IR Channel to Channel Co-Registration Correction Implementation and GVAR changes" by Zhenping Li. GOES-13 Sounder Dropped Pixel Correction: The last significant element included in this software release is the implementation of an algorithm which utilizes a second sync-bit code if the first is not found. This algorithm will allow the software to recover what was previously considered as lost data blocks which are depicted as missing pixels (black spots) since July 2013. More detail can be found in the paper, "SPS 10.4.1 Release Notes" by David Herceg. |
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