| Autor: |
Vornberger, Patricia, Bindschadler, Robert |
| Předmět: |
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| Zdroj: |
Photogrammetric Engineering & Remote Sensing; Apr2000, Vol. 66 Issue 4, p417, 0p |
| Abstrakt: |
The ability of different visible-band satellite imagers to detect subtle ice-sheet topographic features is examined by both qualitative and quantitative comparisons. The AVHRR 10-bit sensor is shown to havethe best radiometric resolution, but its poorer spatial resolution limits this sensor's ability to discriminate smaller scale topography.RESURS-01 is a less well known 8-bit sensor, but this instrument's higher noise and poorer radiometric resolution restrict its utility for ice-sheet research. Landsat TM applies 8-bit quantization over a narrower radiometric range, causing it to saturate for some conditions.This limitation allows TM to achieve a radiometric resolution half that of AVHRR while retaining a much higher spatial resolution. No SPOT imagery was compared, but the sensor is shown to have less radiometric resolution than TM . However, SPOT has better spatial resolution and is less likely to saturate. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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