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