We recognise that remote sensing can be applied to a broad range of "environments". Next

For the remote sensing toolkit, these are defined as follows:

## Marine

Abiotic and biotic features below the high-tide limit to the sea-floor

## Terrestrial

Abiotic and biotic features above the high-tide limit to its boundary layer with the atmosphere

## Atmospheric

Region extending from terrestrial and marine boundary layer to the ionosphere