MODIS MCD43A4

Archive: since 2013

MODIS MCD43A4 Imagery

About MODIS MCD43A4

The purpose of the MODIS (Moderate-resolution Imaging Spectroradiometer) system is to collect data for calibrated global interactive Earth models as a single system. These models predict global changes with sufficient accuracy to inform decisions concerning environmental protection. Both Terra- and Aqua-MODIS instruments view the entire surface of the Earth every 1 to 2 days, acquiring data across 36 spectral bands from 0.4s to 14.4 μm. The MODIS survey materials have a wide range of applications for the study of the atmosphere, land, and ocean.

The main atmospheric research areas that benefit from MODIS are cloud cover, aerosols, and water vapor; all important climate-forming factors. Central to MODIS research is the study of the ozone layer. Channel 30 (9.580-9.880 μm) operates in the area of ozone absorption and is specifically designed for studying the total thickness of the ozone layer in the troposphere and stratosphere. Both day and night survey data are used in the calculation of this value. The resulting images have a resolution of 5 km and are used not only to study the dynamics of the ozone layer, but also for atmospheric correction of other MODIS images, and the study of jet streams in the atmosphere.

Water vapor, one of the main greenhouse gases, is easily detected by the MODIS system, which measures gas concentrations in the air column under the satellite by the transparency of the atmosphere in the absorption zone of water vapor. The water vapor content is obtained from daytime imaging data in the near infrared range with a resolution of 1 km, as well as data from day and night photography in the zones of the thermal range with a resolution of 5 km. These measurements are used to study the global water cycle, the interaction between aerosols and clouds, the energy balance and the Earth's climate.

MCD43A4 provides the 500 meter reflectance data of the MODIS “land” bands 1-7 adjusted using the bidirectional reflectance distribution function to model the values as if they were collected from a nadir view.

MODIS MCD43A4 Characteristics

Characteristic
Description
Temporal Granularity
February 2000 -- Present
Spatial Extent
Global
File Size
~20.51 MB
Coordinate System
Sinusoidal
Datum
N/A
Geographic Dimensions
~1200 km x 1200 km
Number of Science Dataset (SDS) Layers
14
Columns/Rows
2400 x 2400
Pixel Size
~500

MODIS MCD43A4 Specifications

Band Wavelength (nm) Resolution (m) Primary Use
1 620–670 250 Land/Cloud/Aerosols Boundaries
2 841–876 250
3 459–479 500 Land/Cloud/Aerosols Properties
4 545–565 500
5 1230–1250 500
6 1628–1652 500
7 2105–2155 500
8 405–420 1000 Ocean Color/ Phytoplankton/ Biogeochemistry
9 438–448 500
10 483–493 1000
11 526–536 1000
12 546–556 1000
13 662–672 1000
14 673–683 1000
15 743–753 1000
16 862–877 1000
17 890–920 1000 Atmospheric
Water Vapor
18 931–941 1000
19 915–965 1000
20 3.660–3.840 1000 Surface/Cloud
Temperature
21 3.929–3.989 1000
22 3.929–3.989 1000
23 4.020–4.080 1000
24 4.433–4.498 1000 Atmospheric
Temperature
25 4.482–4.549 1000
26 1.360–1.390 1000 Cirrus Clouds
Water Vapor
27 6.535–6.895 1000
28 7.175–7.475 1000
29 8.400–8.700 1000 Cloud Properties
30 9.580–9.880 1000 Ozone
31 10.780–11.280 1000 Surface/Cloud
Temperature
32 11.770–12.270 1000
33 13.185–13.485 1000 Cloud Top
Altitude
34 13.485–13.785 1000

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