S-NPP VIIRS L3 Monthly 500m Burned Area Product File Specification Version 1.0.1 (August 2019) PGE Version : 1.0.4 PGE Release : 2019-08-16 Product ID(s): VNP64A1 (L3 Monthly 500m Burned Area) S-NPP VIIRS Burned Area Monthly L3 Global 500m SIN Grid Description: This document specifies the format for the monthly S-NPP VIIRS Level 3 Burned Area 500m SIN Grid product (VNP64A1). Note: In accordance with the terms of the NASA grant agreement funding the development of this ESDR, the VNP64A1 product will at least initially be generated and distributed as HDF4 files nearly identical in format to the MODIS Collection 6 MCD64A1 monthly burned area product. Point of Contact: Louis Giglio (PI) University of Maryland lgiglio@umd.edu (301) 405-0064 Joanne Hall University of Maryland, Department of Geographical Sciences jhall1@umd.edu (301) 405-6095 =========================================================================== 1. ECS Granule Metadata 1.1 CoreMetadata.0 A tiny subset of MODIS-era ECS Core metadata are stored in a single HDF attribute as a large string of PVL text. Name ECS Type ---- -------- HorizontalTileNumber string VerticalTileNumber string 1.2 StructMetadata.0 This string will be populated automatically by HDF-EOS. 2. Product-Specific Granule Metadata The following fields are stored as individual HDF global attributes. Name HDF Data Type ---- ------------- BurnedCells int32 MissingCells int32 LandCells int32 ValidLandCells int32 ProductStartDay int16 ProductEndDay int16 year int16 tile six-character string (e.g., "h10v06") CodeVersion five-character string (e.g., "3.8.6") VNP64A0_input_file string LC_input_file string ShortName string ("VNP64A1") LongName string 3. Scientific Data Sets Name Data Type Dimensions ---- --------- ---------- Burn Date int16 YDim:MOD_Grid_Monthly_500m_BA, XDim:MOD_Grid_Monthly_500m_BA Description: Ordinal date of burn, with 0 = unburned. A value of -1 is used to flag missing data, and a value of -2 is used to flag grid cells located in water. SDS Attributes: Attribute Type Quantity Value --------- ---- -------- -------- valid_range int16 2 0, 366 long_name string 19 "ordinal day of burn" _FillValue int16 1 -1 water int16 1 -2 ============================================================================= Name Data Type Dimensions ---- --------- ---------- Burn Date Uncertainty int8 YDim:MOD_Grid_Monthly_500m_BA, XDim:MOD_Grid_Monthly_500m_BA Description: Temporal uncertainty in burn date. SDS Attributes: Attribute Type Quantity Value --------- ---- -------- -------- units string 4 "days" long_name string 23 "uncertainty day of burn" ============================================================================= Name Data Type Dimensions ---- --------- ---------- QA int8 YDim:MOD_Grid_Monthly_500m_BA, XDim:MOD_Grid_Monthly_500m_BA Description: Product quality assurance flags. Bit Description --- ----------- 0 land/water flag 0 = water 1 = land 1 valid data flag 0 = missing data 1 = valid 2 shortened mapping period (0 = false, 1 = true) 3 class updated during contextual relabeling phase (0 = false, 1 = true) 4 unused (set to 0) 5-7 unburned grid cell special-condition code 0 = none or not applicable (e.g., grid cell is burned) 1 = valid observations spaced too sparsely in time 2 = too few training observations 3 = apparent burn date at limits of time series 4 = apparent persistent water contamination 5 = persistent hotspot Bits 5-7 provide an explanation for any grid cells that were summarily classified as "unburned" by the mapping algorithm due to special circumstances. The vast majority of unburned grid cells do not fall into this category and will have a special-condition code of 0 (as will all burned, missing-data, and water grid cells). SDS Attributes: Attribute Type Quantity Value --------- ---- -------- -------- units string 9 "bit field" ============================================================================= Name Data Type Dimensions ---- --------- ---------- First Day int16 YDim:MOD_Grid_Monthly_500m_BA, XDim:MOD_Grid_Monthly_500m_BA Description: First day of reliable change detection. SDS Attributes: Attribute Type Quantity Value --------- ---- -------- -------- valid_range int16 2 1, 366 long_name string 38 "first day of reliable change detection" _FillValue int16 1 -1 water int16 1 -2 ============================================================================= Name Data Type Dimensions ---- --------- ---------- Last Day int16 YDim:MOD_Grid_Monthly_500m_BA, XDim:MOD_Grid_Monthly_500m_BA Description: Last day of reliable change detection. SDS Attributes: Attribute Type Quantity Value --------- ---- -------- -------- valid_range int16 2 1, 366 long_name string 37 "last day of reliable change detection" _FillValue int16 1 -1 water int16 1 -2