NASA MODIS/GOES Hybrid Products
NASA SPoRT receives the full complement of GOES-East (-13) imager data at our ground station. There are five channels, with data received at typically a 15-minute frequency. SPoRT's Eastern CONUS domain is subsetted from every GOES image for four of its five channels. These are reprojected on a standard Lambert Conformal projection, preserving the GOES-East resolutions. (Table 1)
| GOES-E Band | GOES-E Central Wavelength (µm) | GOES-E Resolution (km) | MODIS channel # | MODIS Bandwidth (µm) | MODIS Resolution (km) | Real-Time Data |
|---|---|---|---|---|---|---|
| Visible | 0.65 | 1 | 1 | 0.62 - 0.67 | .250 |  |
| Water Vapor | 6.7 | 4 | 27 | 6.535 - 6.895 | 1 | |
| Infrared | 10.7 | 4 | 31 | 10.780 - 11.280 | 1 | |
SPoRT retrieves MODIS (Aqua and Terra) data from the University of Wisconsin's Space Science and Engineering Center. SSEC has a MODIS direct broadcast receiving station. The data received there easily covers the Eastern two-thirds of the US & Canada, and roughly the Northern half of the Gulf of Mexico.
The MODIS data are first corrected for bowtie effect and reprojected using the same standard Lambert Conformal projection as GOES. The MODIS data are maintained at its native resolution (Table 1).
When a MODIS swath arrives, its overpass time is used to determine which fifteen minute GOES image is the best match. MODIS data latency is typically up to an hour and a half. Next, the MODIS data are inserted into the appropriate GOES image reprojecting both with the highest MODIS resolution possible. (Table 1) This new data must then be resent to SPoRT partners via LDM overwriting the data previously sent.
For more information on SPoRT's MODIS data, visit our MODIS page.
For more information on SPoRT's GOES data, visit our GOES Imager page.
