# Presentation: 358862

## Moderate-resolution Imaging Sensor (MODIS)

**Background and Pre-processing**
- Dr. Jackson Cothren
- Center for Advanced Spatial Technologies
- University of Arkansas

## MODIS Sinusoidal Grid (SIN Grid)

## MODIS/Terra Surface Reflectance 8-Day 

- L3 Global 500m SIN Grid
- MOD09A1

| Area | ~ 10 x 10° lat/lon |
| --- | --- |
| Image Dimensions | 2400 x 2400 rows/cols |
| File Size | ~ 160 MB |
| Resolution | 463 meters |
| Projection | Sinusoidal |
| Data Format | HDF-EOS |
| Science Data Sets | 12 |

## Surface Reflectance Bands

| SDS | UNITS | DATA TYPE-bit | FILL VALUE | VALID RANGE | SCALE FACTOR |
| --- | --- | --- | --- | --- | --- |
| Band 1 (620-670 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 2 (841-876 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 3 (459-479 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 4 (545-565 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 5 (1230-1250 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 6 (1628-1652 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |
| Band 7 (2105-2155 nm) | reflectance | 16-bit integer | -28672 | -100-16000 | 10000 |

## Support Information (Land Processes DAAC)

| QC Flags | Bit field | 32-bit unsigned integer | 4294967295 | 0-4294966531 | na |
| --- | --- | --- | --- | --- | --- |
| Solar Zenith Angle | degree | 16-bit integer | 0 | 0-18000 | 100 |
| Viewing Angle | degree | 16-bit integer | 0 | 0-18000 | 100 |
| Relative Azimuth | degree | 16-bit integer | 0 | -18000-18000 | 100 |
| State Flag | Bit field | 16-bit unsigned integer | 65535 | 0-57343 | na |

## Slide 6

| BAND # | RANGE (nm) | KEY USE |
| --- | --- | --- |
| 1 | 620-670  (red) | Absolute Land Cover |
| 2 | 841-876 (near infrared) | Clound Amount, Vegetation Land Cover |
| 3 | 459-479 (blue) | Soil/Vegetation Differences |
| 4 | 545-565 (green) | Green Vegetation |
| 5 | 1230-1250 (mid infrared) | Leaf/Canopy Differences |
| 6 | 1628-1652 (mid infrared) | Snow/Cloud Differences |
| 7 | 210-2155 (mid infrared) | Cloud Properties, Land Properties |

## Julian Day 185

- 32% cloud free

- Julian Day 201

- 28% cloud free

- Julian Day 209

- 46% cloud free

- Julian Day 217

- 15% cloud free

## Seasonal Composite, July - August

- 72% Cloud free

## MOD12Q1 Global Land Cover Product 1 km pixels 

- MOD12Q1 Global Land Cover Product 1 km pixels
- (produced for 2001 only from MOD09 product by NASA)

- Water

- Shrub

- Grass

- Snow and ice

- Urban and built up

- Barren /sparse veg

- Broadleaf crop

- Cereal crop

- Deciduous needleleaf

- Deciduous broadleaf

- Evergreen needleleaf

- Evergreen broadleaf

## LULC Design for Carbon Sequestration

- LULC maps designed to provide regional land-cover data to carbon sequestration model
- Higher resolution data and processing costs too high to reproduce annually
- MODIS provides consistent surface reflectance values over long periods of time
- Repeatable and affordable in terms of cost and processing requirements.
- Intended to provide efficient LULC updates between “calibration” years
- Calibration years represent extensive LULC determination with higher resolution data (examples are 1990 and 2000 Earthsat coverage)

## MOD09 Pre-processing Tool