VIIRS Land Pre-launch Science Test
Test Description and Status

Introudction:

The NPP VIIRS Land Science Version of the Codes (SCI) developed by the NPP Land Science Software developers at NGST and the Operational Version of the code developed at the IDPS (OPS) are downloaded from CasaNOSA and are integrated into the NPPDAPS at Land PEATE. LandPEATE may develop its own algorithms or modify the OPS/SCI algorithms for various reasons such as to improve algorithm performance, relax certain exclusion condition, etc. These modified versions are labeled as Land PEATE Adjusted (LPA) version. The science, ops and LPA version of the PGEs thus developed are tested using proxy data. Two types of proxy data are used in the tests.

MODIS Proxy data - MODIS instrument data mapped to the VIIRS bands with MODIS viewing geometry.

VIIRS Proxy data - MODIS instrument data mapped to the VIIRS bands with VIIRS viewing geometry.

The objective of these Science Tests during the pre-launch period is to evaluate the VIIRS land product algorithms by comparing the products produced from the science test using these algorithms to the Colleciton 5 MODIS land data products. Science test results are evaluated by LDOPE and the VIIRS Land Science Teams. The science or ops version of the algorithms are updated at Land PEATE or at the individual Science Facilities. The products from the science tests are made available to the NPP land science teams and LDOPE through a password protected ftp site lpeate.nascom.nasa.gov. For user name and password please contact Gang Ye or Sadashiva Devadiga.

Science Tests:

The following table identifies the various major science tests that have been performed or are planned as part of the evaluation of the NPP algorithms pre-launch. Additional information such as individual test objective, the PGE Versions used can be obtained for the major tests that have been completed or are in progress by clicking on the Test name.

Updateed: 11/08/2011


Test NameTest IDAS#PGE VersionsTest PeriodRun StatusEvaluation Status
Mx5 One-day Global Test Test 23
(LPEATE vs IDPS)
1147
754
  2010249 2011-11-03 On going
GB
Mx4 51-day Test Test 22 767 PGEs 2007170-2007222 On going On going
GB GTB
LPEATE GOE 14-day Test Test 21 766
765
PGEs 2010249-2010263 2011-10-19 On going
GB
NCT4/Cal-Val-Rehearsal Test 20
Science Phase
LPEATE vs Aggregated
755
754
PGEs 2010249-2010256 2011-09-02 On going
GB
Test 19
Observatory Phase/Cal-Val-Rehearsal
  PGEs 36 hour data flow from current period, time to coincide with actual flow of data. On going  
Mx4 Chain Test Test 18
OPS vs OPS/LPA
1145
1146
All PGEs 2007193 2011-07-05 On going
GB
Test 17
OPS vs B48
1145
609
All PGEs 2007193 2011-07-05 On going
GB
MiniIDPS Test 16
IDPS vs LPEATE
1137
1138
All PGEs 2003025 2011-07-05 On going
GB
Special PGE311 Test Test 15 610
609
  2007193 2011-06-09 On going
GB
NCT3 Test Test 14 753   2010249-2010251 2011-04-20 On going
GB
Centos/Mandriva Test Test_13.2 (n-day) NPP_002.01 612
609
All n-day PGEs 2007170-2007222 2011-05-10 On going
GB GTB
Test_13 (One day) 1144
1143
All Daily PGEs 2003193 2011-03-30 On going
GB GTB
B48 Test
MODIS_VIIRS_PROXY
Test_12
One day OPS Granulation PGE Test
1143
1133
All PGEs 2003193 On going On going
GB
Test 11
51-day Test
609 All PGEs 2007170-2007222 2011-05-07 On going
GB GTB
Test_10
16-day Test
Change in Areosol LUT
610
606
  2003193-2003208 2010-12-17 On going
GB GTB
Test_9
8-day data set during winter
NPP_005.01
607   2003033-2003040 2010-11-01 On Going
GB
Test_8
16-day Test
606   2003193-2003208 2010-07-13 On Going
GB GTB TS
B25 Test
MODIS_VIIRS_PROXY
Test_6
8-day data set during winter
NPP_002.03
604   2003033-2003040 2010-02-12 Evaluated
GB
Test_5
16 Day Global Test Using New LWM
NPP_002.02
605   2003193-2003208 2010-02-11 Evaluated
GB
Test_4
51 Day Global Test
602   2003170-2003222 2009-09-17 Evaluated
GB GTB KI TS
Test_3
16 Day Global Test
1112   2003193-2003208   Evaluated
GB KI
Test_2
One Day Global Test
1112 (OPS)
1115 (OPS&LPA)
  2002222   Evaluated
GB KI
Build 1.4 Test
VIIRS Proxy
Test_1
1.2 Orbit Test
1113 (OPS)
1116 (OPS&LPA)
  2003025   Evaluated
GB KI


KEY:

Test run on lpeate Completed on the date In progress - start date Image Completed, Evaluation on going
Test Data Archive Set # | Baseline Data Archive Set #
GB: Global Browse | GTB: Golden Tile Browse | KI: Know Issues | TS: Time Series