---
name: "topic_radiometric_conversion"
section: "1grass"
platform: "linux"
package: "grass-doc"
version: "8.4.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/topic_radiometric_conversion"
---

# topic\_radiometric\_conversion(1grass)

## Topic: radiometric conversion

| | | |
| --- | --- | --- |
| i.aster.toar |  | Calculates Top of Atmosphere Radiance/Reflectance/Brightness Temperature from ASTER DN. |
| i.landsat.toar |  | Calculates top-of-atmosphere radiance or reflectance and temperature for Landsat MSS/TM/ETM+/OLI |

*See also the corresponding keyword radiometric conversion for additional references.*

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