Land Surface Temperature (LST)
[DOI: 10.57746/EO.01gs73b3gb1c3evfz28g98tc1f]

Introduction

LST Define Temperature of terrestrical land surface.
Unit Kelvin
ATBD Ver.1 (Sep. 2014)
Ver.2 (May 2020)
Ver.3 (Jun. 2021)

Update contents of Ver.2

  • ・Added input data(CLFG)
  • ・Modified QA flag

Update contents of Ver.3

  • ・Modified cloud screening level using QA_flag
  • ・Modified QA_flag (Error_DN)
  • ・Modified Mask_for_statistics

Sample image

File format Ver.1 Ver.2 Ver.3
hdf5 TBU
 LST_Q(250m)
 LST_Q(250m)
JPEG TBU
 LST_Q(250m)
 LST_Q(250m)

Dataset name

Ver.1,2,3 Description
E01 Land Surface Emissivity @ TI01
E02 Land Surface Emissivity @ TI02
LST Land Surface Temperature
QA_flag

QA_flag information

Ver.1 Ver.2 Ver.3 Ver.1(Sample Image) Ver.2(Sample Image) Ver.3(Sample Image)

Bit ver1 Description E01_L3_mask* E02_L3_mask* LST_L3_mask*
0 no input data 0:no_data, 1:valid data 1 1 1
1 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
2 Spare 0 0 0
3 Spare 0 0 0
4 no VNR/SWR 1:VNR/SWIR no_data 1 1 1
5 Snow 0 0 0
6 Sensor zenith angle > 33 1:yes 0 0 0
7 Sensor zenith angle > 43 1:yes 0 0 0
8 TR1 < 0.6 0 0 0
9 RES > 1[K] (CNVERR>1.0)&&(CNVERR<= 2.0) 0 0 0
10 RES > 2[K] CNVERR> 2.0 0 0 0
11 Probably Cloudy 1 1 1
12 Cloudy 1 1 1
13 TS out of range (TS<173.15) ||(TS>370.0) 1 1 1
14 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
15 no input data 0:no_data, 1:valid data 1 1 1

 * Bits masked by statistical processing are indicated by 1.

 Please refer to here to the detail information for QA flag.

Bit ver2 Description E01_L3_mask* E02_L3_mask* LST_L3_mask*
0 no input data 0:no_data, 1:valid data 1 1 1
1 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
2 Spare 0 0 0
3 no CLFG 1:yes 0 0 0
4 no VNR/SWR 1:VNR/SWIR no_data 1 1 1
5 Snow 0 0 0
6 Sensor zenith angle > 33 1:yes 0 0 0
7 Sensor zenith angle > 43 1:yes 0 0 0
8 TR1 < 0.6 0 0 0
9 RES > 1[K] (CNVERR>1.0)&&(CNVERR<= 2.0) 0 0 0
10 RES > 2[K] CNVERR> 2.0 0 0 0
11 Probably Cloudy 1 1 1
12 Cloudy 1 1 1
13 TS out of range (TS<173.15) ||(TS>370.0) 1 1 1
14 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
15 no input data 0:no_data, 1:valid data 1 1 1

 * Bits masked by statistical processing are indicated by 1.

 Please refer to here to the detail information for QA flag.

Bit ver3 Description E01_L3_mask* E02_L3_mask* LST_L3_mask*
0 no input data 0:no_data, 1:valid data 1 1 1
1 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
2 Spare 0 0 0
3 no CLFG 1:yes 0 0 0
4 no VNR/SWR 1:VNR/SWIR no_data 1 1 1
5 Snow 0 0 0
6 Sensor zenith angle > 33 1:yes 0 0 0
7 Sensor zenith angle > 43 1:yes 0 0 0
8 TR1 < 0.6 0 0 0
9 RES > 1[K] (CNVERR>1.0)&&(CNVERR<= 2.0) 0 0 0
10 RES > 2[K] CNVERR> 2.0 0 0 0
11 Probably Cloudy 0 0 0
12 Cloudy 1 1 1
13 TS out of range (TS<173.15) ||(TS>370.0) 1 1 1
14 land/water flag(0=land/1=water) 0:land, 1:water 1 1 1
15 no input data 0:no_data, 1:valid data 1 1 1

 * Bits masked by statistical processing are indicated by 1.

 Please refer to here to the detail information for QA flag.

*Download:QA_flag(Ver.1) Sample Image

Attribute information

Ver.1,2,3 Attribute Remarks
Attribute of Image_data
Attribute of Image_data Grid_interval 0.0020833334 250m: 0.00208333
Grid_interval_unit deg
Image_projection EQA (sinusoidal equal area) projection from 0-deg longitude
Number_of_lines 4800 250m: 4800
Number_of_pixels 4800
E01
E01
8-bit unsigned integer		 Data_description Land Surface Emissivity @ TI01
Error_DN 255
Mask_for_statistics 63507 Detail: QA_flag_information(～L3_mask)
Maximum_valid_DN 254
Minimum_valid_DN 0
Offset 0.49
Slope 0.002
Unit NA
E02
E02
8-bit unsigned integer		 Data_description Land Surface Emissivity @ TI02
Error_DN 255
Mask_for_statistics 63507 Detail: QA_flag_information(～L3_mask)
Maximum_valid_DN 254
Minimum_valid_DN 0
Offset 0.49
Slope 0.002
Unit NA
LST
LST
16-bit unsigned integer		 Data_description Land Surface Temperature (LST)
Error_DN 65535
Mask_for_statistics 63507 Detail: QA_flag_information(～L3_mask)
Maximum_valid_DN 65534
Minimum_valid_DN 0
Offset 0
Slope 0.02
Unit Kelvin

How to use

  • ・Physical quantity＝DN*slope + offset
  • ・Valid values are during Minimum_valid_DN～Maximum_valid_DN