- Dataset Availability
- 2000-03-05T00:00:00Z–2017-03-30T00:00:00Z
- Dataset Provider
- NASA LP DAAC at the USGS EROS Center
- Earth Engine Snippet
-
ee.ImageCollection("MODIS/MOD11A1") - Tags
Description
The MODIS/Terra Land Surface Temperature and Emissivity (LST/E) product, MOD11A1, provides per-pixel temperature and emissivity values, which are produced daily using the generalized split-window LST algorithm. This algorithm is optimally used to separate ranges of atmospheric column water vapor and lower boundary air surface temperatures into tractable sub-ranges. The surface emissivities in bands 31 and 32 are estimated from land cover types.
The V5 MOD11A1 products are projected in a Sinusoidal grid by mapping the level-2 LST product (MOD11_L2) on 1-kilometer (precisely 0.928-km) grids. The MOD11A1 product comprises the following Science Data Set (SDS) layers for daytime and nighttime observations:
- LST_Day_1km: Daytime Land Surface Temperatures (K), Scale 0.02
- QC_Day: Daytime Surface Temperature quality control assessments
- Day_view_time: Daytime LST Observation Times (Hours), Scale 0.1
- Day_view_angle: Daytime View Zenith Angles (Degrees), Offset -65.0
- LST_Night_1km: Nighttime Land Surface Temperatures (K), Scale 0.02
- QC_Night: Nighttime Surface Temperature quality control assessments
- Night_view_time: Nighttime LST Observation Times (Hours), Scale 0.1
- Night_view_angle: Nighttime View Zenith Angles (Degrees), Offset -65.0
- Emis_31: Bands 31 Emissivity, Scale 0.002, Offset 0.49
- Emis_32: Bands 32 Emissivity, Scale 0.002, Offset 0.49
- Clear_night_cov: Nighttime Clear Sky Coverage, Scale 0.0005
- Clear_day_cov: Daytime Clear Sky Coverage, Scale 0.0005
QC bit flags:
- Bits 0-1: Mandatory QC Flag
- 00: LST produced, good quality, not necessary to examine detailed QC.
- 01: LST produced, unreliable or unquantifiable quality, recommend examination of more detailed QC.
- 10: LST not produced due to cloud effects.
- 11: LST not produced primarily due to reasons other than clouds.
- Bits 2-3: Data Quality Flag
- 00: Good quality L1B in bands 31 and 32.
- 01: Other quality data.
- 10: TBD
- 11: TBD
- Bits 4-5: Emissivity Error Flag
- 00: Average emissivity error ≤ 0.01
- 01: Average emissivity error ≤ 0.02
- 10: Average emissivity error ≤ 0.04
- 11: Average emissivity error > 0.04
- Bits 6-7: LST Error Flag
- 00: Average LST error ≤ 1 K
- 01: Average LST error ≤ 2 K
- 10: Average LST error ≤ 3 K
- 11: Average LST error > 3 K
The V5 Terra/MODIS LST/E products, including MOD11A1, are validated to Stage-2 through field campaigns and radiance-based validation studies.
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Terms of Use
Terms of Use
MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.