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What are the different Proba-V products?

What are the different planes in the Proba-V L3 products?

Other properties for the Proba-V L3 products

What are the different planes in the Proba-V L1C products?

1. What are the different Proba-V products?

  • Proba-V L1C: Radiometrically corrected Level 1B data (i.e. unprojected TOA reflectance), given per strip/camera. Pixel digital numbers are converted to radiance values. Image remains in raw sensor geometry (unprojected).
  • Proba-V S1 TOA (at 1km and 333m): Proba-V Level3 Top Of Atmosphere (no atmospheric corrections applied) daily synthesis product at 1KM spatial resolution containing:
    • (1) Top Of Atmosphere reflectance in the four spectral bands corresponding to the selected measurement, without atmospheric correction being performed
    • (2) Normalized Difference Vegetation Index (NDVI). This should be considered as a first example of a widely accepted surface parameter, and capabilities to include other quantities derived from surface reflectance should be preserved in the system
    • (3) Geometric viewing conditions
    • (4) Reference to date and time of selected measurement
    • (5) Information on the composite status map (containing identification of snow, ice, shadow, clouds, land/sea for every pixel)

The datasets are resampled to a fixed grid in the Plate Carrée (equidistant) projection at 1KM spatial resolution.

  • Proba-V S1 TOC (at 1km and 333m): Proba-V Level3 Top Of Canopy (atmospheric corrections applied) daily synthesis product at 1KM spatial resolution containing:
    • (1) Top Of Canopy (ground surface) reflectance in the four spectral bands corresponding to the selected measurement, the atmospheric correction being performed using the SMAC procedure
    • (2) Normalized Difference Vegetation Index (NDVI). This should be considered as a first example of a widely accepted surface parameter, and capabilities to include other quantities derived from surface reflectance should be preserved in the system
    • (3) Geometric viewing conditions
    • (4) Reference to date and time of selected measurement
    • (5) Information on the composite status map (containing identification of snow, ice, shadow, clouds, land/sea for every pixel)

The datasets are resampled to a fixed grid in the Plate Carrée (equidistant) projection at 1KM spatial resolution.

  • Proba-V S10 TOC (at 1km and 333m): Decadal synthesis of S1's as Maximum Value Compositing (MVC). Proba-V Level3 Top Of Canopy (atmospheric corrections applied) ten-daily synthesis product at 1KM spatial resolution containing:
    • (1) Top Of Canopy (ground surface) reflectance in the four spectral bands corresponding to the selected measurement, the atmospheric correction being performed using the SMAC procedure
    • (2) Normalized Difference Vegetation Index (NDVI). This should be considered as a first example of a widely accepted surface parameter, and capabilities to include other quantities derived from surface reflectance should be preserved in the system
    • (3) Geometric viewing conditions
    • (4)Reference to date and time of selected measurement
    • (5) Information on the composite status map (containing identification of snow, ice, shadow, clouds, land/sea for every pixel)

The datasets are resampled to a fixed grid in the Plate Carrée (equidistant) projection at 1KM spatial resolution.

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2. What are the different planes in the Proba-V L3 products?

Within the HDF5 product there are 13 planes for Level3 products:

Plane Abbreviation Description Data type NO_DATA flag Real value = DN*a+b Units
GEOMETRY

1

SAA Solar Azimuth Angles 8-bit unsigned character

255

a = 3/2
b = 0

Degrees

2

SWIR VAA Viewing Azimuth Angles SWIR detector 8-bit unsigned character

255

a = 3/2
b = 0

Degrees

3

SWIR VZA Viewing Azimuth Angles SWIR detector 8-bit unsigned character

255

a = 0.5
b = 0

Degrees

4

SZA Solar Zenith Angles 8-bit unsigned character

255

a = 0.5
b = 0

Degrees

5

VNIR VAA Viewing Azimuth Angles VNIR detector 8-bit unsigned character

255

a = 3/2
b = 0

Degrees

6

VNIR VZA Viewing Zenith Angles VNIR detector 8-bit unsigned character

255

a = 0.5
b = 0

Degrees

NDVI

7

NDVI Normalized Difference Vegetation Index 8-bit unsigned character

255

a = 0.004
b = -0.08

-

QUALITY

8

SM Status map 8-bit unsigned character

2

a = 1
b = 0

-

RADIOMETRY

9

BLUE Top Of Atmosphere/Canopy Reflectance BLUE 16-bit integer

-1

a = 0.0005
b = 0

-

10

NIR Top Of Atmosphere/Canopy Reflectance NIR 16-bit integer

-1

a = 0.0005
b = 0

-

11

RED Top Of Atmosphere/Canopy Reflectance RED 16-bit integer

-1

a = 0.0005
b = 0

-

12

SWIR Top Of Atmosphere/Canopy Reflectance SWIR 16-bit integer

-1

a = 0.0005
b = 0

-

TIME

13

TG Time grid 8-bit unsigned character

-1

a = 1
b = 0

Minutes

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3. Other properties for the Proba-V L3 products

Example of metadata in a L3 product (highlighted text differs per tile/day): 

DESCRIPTION = PROBA-V Level3 Top Of Atmosphere Daily Synthesis at 333M resolution

  • INSTRUMENT = VEGETATION
  • MAP_PROJECTION_FAMILY = GEOGRAPHIC
  • MAP_PROJECTION_NAME = GEOGRAPHIC_LAT_LON_WGS84
  • MAP_PROJECTION_REFERENCE = EPSG:4326
  • MAP_PROJECTION_UNITS = DEGREES
  • MAP_PROJECTION_WKT = GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID
    ["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM
    ["Greenwich",0,AUTHORITY["EPSG","8901"]]
    ,UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY
    ["EPSG","4326"]]
  • PLATFORM = PROBA-1
  • PROCESSING_DATE = 2013-06-11
  • PROCESSING_TIME = 23:50:24
  • PRODUCT_REFERENCE = Synthesis_PROBAV_20130610_S1_TOA_333M_V001
  • PRODUCT_VERSION = 1
  • SYNTHESIS_PERIOD = 1 (this number is 10 if a ten-daily synthesis is concerned)

The Proba-V L3 products are distributed to the customers in 10°x10° tiles. Characteristics of a tile:

  • 3360 samples, 3360 lines
  • Xres,Yres = 0.00297619
  • Position of the UL coordinate: (0.5,0.5)

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4. What are the different planes in the Proba-V L1C products?

For the L1C products there are always three products, from the left, center and right camera.
In the L1C products there are three different groups:

  • LEVEL1A: 20 planes
  • LEVEL1B: 55 planes
  • LEVEL1C: 12 planes

Description of the Level 1B planes:


Plane
Abbreviation Description

Data type

NO_DATA flag

Real value = DN*a+b

Units

BLUE

21

CONTOUR Vector describing the contours of the Blue camera

22

LN1 Longitude grid at 0m height 32-bit floating-point

-9999

a = 1
b = 0

Degrees

23

LN2 Longitude grid at 5000m height 32-bit floating-point

-9999

a = 1
b = 0

Degrees

24

LT1 Latitude grid at 0m height 32-bit floating-point

-9999

a = 1
b = 0

Degrees

25

LT2 Latitude grid at 5000m height 32-bit floating-point

-9999

a = 1
b = 0

Degrees

26

SAA Solar Azimuth Angles grid 8-bit unsigned character

255

a = 3/2
b = 0

Degrees

27

SZA Solar Zenith Angles grid 8-bit unsigned character

255

a = 0.5
b = 0

Degrees

28

VAA Viewing Azimuth Angles grid 8-bit unsigned character

255

a = 3/2
b = 0

Degrees

29

VZA Viewing Zenith Angles grid 8-bit unsigned character

255

a = 0.5
b = 0

Degrees

The description of the LEVEL1C planes:


Plane
Abbreviation Description

Data type

NO_DATA flag

Real value = DN*a+b

Units

BLUE

76

Q Radiometry quality status grid (0=Correct, 1=Missing, 2=WasSaturated, 3=BecameSaturated, 4=BecameNegative, 5=Interpolated, 6=BorderCompressed) 8-bit unsigned character

1

a = 1
b = 0

-

77

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

NIR

78

Q Cfr BLUE Q (plane 76) 8-bit unsigned character

1

a = 1
b = 0

-

79

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

RED

80

Q Cfr BLUE Q (plane 76) 8-bit unsigned character

1

a = 1
b = 0

-

81

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

SWIR1

82

Q Cfr BLUE Q (plane 76) 8-bit unsigned character

1

a = 1
b = 0

-

83

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

SWIR2

84

Q Cfr BLUE Q (plane 76) 8-bit unsigned character

1

a = 1
b = 0

-

85

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

SWIR3

86

Q Cfr BLUE Q (plane 76) 8-bit unsigned character

1

a = 1
b = 0

-

87

TOA Top Of Atmosphere reflectance radiometry data 16-bit integer

-1

a = 0.0005
b = 0

-

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