Table I: Amount of ASTER Data Required Annually
for GLIMS Glacier Measurements.
NOTE: These values for number of
scenes per year are underestimates. A recent Arc/Info analysis
revealed that the total number of scenes per year, for the whole
globe, may be closer to 5000. We have not yet broken this number
down by region.
Also, ASTER Operation rules will make data acquisition less efficient than this
table implies. In particular, even for small targets, a minimum of two minutes
of data acquisition is required for full-mode (all bands) operation.
| Region | Subregion | Number of 60km x 60km scenes
per year | Nominal image acquisitions needed to yield one
cloud-free image
| Case a) VNIR3 only (downloaded GBits/year)
| Case b) VNIR3 + SWIR + TIR (downloaded GBits/year)
|
| Antarctica
| W. Antarctic 'coast'
| 200
| 3 | 160.8
| 292.8 |
|
| E. Antarctic 'coast'
| 450
| 3 | 361.8
| 658.8 |
|
| Amery Ice Shelf
| 60
| 3 | 48.2
| 87.8 |
|
| Ronne-Filchner Shelf
| 80
| 3 | 64.3
| 117.1 |
|
| Ross Ice Shelf
| 180
| 3 | 144.7
| 263.5 |
| Greenland
| Edge of ice sheet
| 130
| 3 | 104.5
| 190.3 |
|
| Outlying ice fields
| 60
| 3 | 48.2
| 87.8 |
| North America
| Alaska
| 69
| 5 | 92.6
| 168.4 |
|
| Conterminous USA
| 11
| 5 | 14.8
| 26.9 |
|
| Canada, continental
| 75
| 5 | 100.7
| 183.1 |
|
| Canada, arctic islands
| 50
| 5 | 67.1
| 122.1 |
| South America
| Cordillera
| 44
| 5 | 59.1
| 107.4 |
| Europe and Africa
| Fennoscandia
| 15
| 5 | 20.1
| 37.3 |
|
| Alps
| 16
| 5 | 21.5
| 39.1 |
|
| Svalbard + Jan Mayen
| 24
| 5 | 32.2
| 58.6 |
|
| Iceland
| 17
| 5 | 22.8
| 41.5 |
|
| Africa
| 3
| 5 | 4.0
| 7.3 |
| Russia
| Russia, arctic islands
| 30
| 5 | 40.3
| 73.2 |
|
| Russia, continental
| 70
| 5 | 94.0
| 170.9 |
| Asia (except Russia)
| Himalayas+Hindu Kush
| 114
| 5 | 153.0
| 278.3 |
|
| Turkey
| 13
| 5 | 17.4
| 31.7 |
|
| Iran
| 4
| 5 | 5.4
| 9.8 |
| Oceania
| New Zealand
| 7
| 5 | 9.4
| 17.1 |
|
| Indonesia
| 3
| 5 | 4.0
| 7.3 |
| TOTALS
|
| 1725
| 5 | 1690.9
| 3078.1 |
| % of Level 1A data (777 14-band scenes daily)
|
|
| | 0.86
| 1.57
|