This false-color image shows the daytime LSTs under clear-sky conditions in the MOD11A1 product retrieved from daytime MODIS data of April 4, 2000 over the southwestern United States and Baja California.
The level-3 MODIS global Land Surface Temperature (LST) and Emissivity daily data include values generated in a Sinusoidally projected tile by mapping the level-2 LST product (MOD11_L2) on 1-kilometer (actual 0.928-km) grids.
MOD11A1 is comprised of daytime and nighttime LSTs, quality assessment, observation times, view angles, clear sky coverage, and emissivities estimated in Bands 31 and 32 from land cover types.
Version-5 MODIS/Terra Land Surface Temperature/Emissivity products are Validated Stage 2, meaning that accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Although there may be later improved versions, these data are ready for use in scientific publications.
Collection 5 Changes in the V5 PGE16 (PDF)
Temporal Coverage | March 5, 2000 - |
Area | ~1100 x 1100 km |
File Size | ~4 MB compressed |
Projection | Sinusoidal |
Data Format | HDF-EOS |
Dimensions | 1200 x 1200 rows/columns |
Resolution | 1 kilometer (0.93-km) |
Science Data Sets (SDS HDF Layers) | 12 |
Science Dat Sets for MODIS/Terra Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid V005 (MOD11A1):
Science Data Sets (HDF Layers) (12) |
UNITS |
BIT TYPE |
FILL |
VALID RANGE |
MULTIPLY BY SCALE FACTOR |
---|---|---|---|---|---|
LST_Day_1km: Daily daytime 1km grid land surface temperature | Kelvin | 16-bit unsigned integer | 0 | 7500–65535 | 0.02 |
QC_Day: Quality control for daytime LST and emissivity | Bit Field | 8-bit unsigned integer | See QA NOTE | 0–255 | na |
Day_view_time: Time of daytime land surface temperature observation | Hours | 8-bit unsigned integer | 255 | 0–240 | 0.1 |
Day_view_angle: View zenith angle of daytime land surface temperature | Degree | 8-bit unsigned integer | 255 | 0–130 | 1 (- 65) |
LST_Night_1km: Daily nighttime 1km grid land surface temperature | Kelvin | 16-bit unsigned integer | 0 | 7500–65535 | 0.02 |
QC_Night: Quality control for nighttime LST and emissivity | Bit Field | 8-bit unsigned integer | See QA NOTE | 0–255 | na |
Night_view_time: Time of nighttime land surface temperature observation | Hours | 8-bit unsigned integer | 255 | 0–240 | 0.1 |
Night_view_angle: View zenith angle of nighttime land surface temperature | Degree | 8-bit unsigned integer | 255 | 0–130 | 1 (-65) |
Emis_31: Band 31 Emissivity | none | 8-bit unsigned integer | 0 | 1–255 | 0.0020 (+ 0.49) |
Emis_32: Band 32 Emissivity | none | 8-bit unsigned integer | 0 | 1–255 | 0.0020 (+ 0.49) |
Clear_day_cov: day clear sky coverage | None | 16-bit unsigned integer | 0 | 1–65535 | 0.00004 |
Clear_night_cov: night clear sky coverage | None | 16-bit unsigned integer | 0 | 1–65535 | 0.00004 |
The table below lists the bit field legend for the LST Quality Indicators.
The QC science data sets in this product (QC_Day, QC_Night) provide the user with information on algorithm results that can be viewed in a spatial context for each pixel. The QC information tells if algorithm results were nominal, abnormal, or if other defined conditions were encountered for a pixel. The QC information should be used to help determine the usefulness of the LST data for a user's needs. The QC information can be extracted by reading the flags stored in an 8-bit unsigned integer. See Table 1 below.
NOTE: there is no FillValue for the QC SDS. This SDS should be used together with the LST SDS. If LST has FillValue 0, the 0–1 bits in QC have values of 10 or 11, other bit fields with 0 as undefined.
Bit No. |
Long Name |
Bit Comb. |
V005 MOD11A1 QC_DAY, QC_NIGHT |
---|---|---|---|
0–1 | Mandatory QA Flags | 00 | LST produced, good quality, not necessary to examine more detailed QA |
01 | LST produced, other quality, recommend examination of more detailed QA | ||
10 | LST not produced due to cloud effects | ||
11 | LST not produced primarily due to reasons other than cloud | ||
2–3 | Data Quality Flag | 00 | good data quality of L1B in bands 31 and 32 |
01 | Other quality data | ||
10 | TBD | ||
11 | TBD | ||
4–5 | Emis 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 | ||
6–7 | LST Error Flag | 00 | Average LST error <= 1 |
01 | Average LST error <= 2K | ||
10 | Average LST error <= 3K | ||
11 | Average LST error > 3K |
Please find the current MODIS-related Data Redistribution and Pricing policies on the MODIS Policies Section of this Web Site
LP DAAC Acknowledgement and Citations Policy
In the event that data distributed from the Land Processes DAAC are incorporated into your research, please supply the following acknowledgment within your published work: "These data are distributed by the Land Processes Distributed Active Archive Center (LP DAAC), located at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center (lpdaac.usgs.gov)." If possible, please e-mail or send us reprints/citations of papers or oral presentations based on data obtained from the LP DAAC (see below for mailing address and e-mail address). This will help us to stay informed of how the data are being utilized.
LP DAAC User Services
U.S. Geological Survey (USGS)
Earth Resources Observation and Science (EROS) Center
47914 252nd Street
Sioux Falls, SD 57198-0001
The complete data record for this product is available through the WIST and GloVis search and order interfaces. A partial record is available on-line through the Data Pool.
Please find links to (and information about) these data access tools on the Get Data Section of this Web Site.
U.S. Geological Survey (USGS)
Center for Earth Resources Observation and Science (EROS)
47914 252nd Street
Sioux Falls, SD 57198-0001
Phone Number: | 605-594-6116 |
Toll Free: | 866-573-3222 |
866-LPE-DAAC | |
Fax: | 605-594-6963 |
Email: | lpdaac@eos.nasa.gov |
Web: | http://lpdaac.usgs.gov |