Recommendation ITU-R P.1511¶
This Recommendation provides global topographical data, information on geographic coordinates, and height data for the prediction of propagation effects for Earth-space paths in ITU-R recommendations.
| Title | Latest approved in | |
|---|---|---|
| Recommendation ITU-R P.1511 | [PDF] | 2019-08 |
| Topography for Earth-space propagation modelling | ||
| Current recommendation version (In force) | Date | |
| Recommendation ITU-R P.1511-2 | [PDF] | 08/2019 |
| Recommendations implemented in ITU-Rpy | Date | |
| Recommendation ITU-R P.1511-2 | [PDF] | 08/2019 |
| Recommendation ITU-R P.1511-1 | [PDF] | 07/2015 |
| Recommendation ITU-R P.1511-0 | [PDF] | 02/2001 |
Introduction¶
This model shall be used to obtain the height above mean sea level when no local data are available or when no data with a better spatial resolution is available.
The values of topographic height of the surface of the Earth above mean sea level (km) are an integral part of this Recommendation. The data is provided on a 1/12° grid in both latitude and longitude. For a location different from the grid points, the height above mean sea level at the desired location can be obtained by performing a bi-cubic interpolation on the values at the sixteen closest grid points
Module description¶
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itur.models.itu1511.change_version(new_version)[source]¶ Change the version of the ITU-R P.1511 recommendation currently being used.
Parameters: new_version (int) – Number of the version to use. Valid values are:
- 1: Activates recommendation ITU-R P.1511-1 (07/15) (Current version)
- 0: Activates recommendation ITU-R P.1511-0 (02/01) (Superseded)
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itur.models.itu1511.get_version()[source]¶ Obtain the version of the ITU-R P.1511 recommendation currently being used.
Returns: version – Version currently being used. Return type: int
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itur.models.itu1511.topographic_altitude(lat, lon)[source]¶ Topographical height (km) above mean sea level of the surface of the Earth.
Parameters: - lat (number, sequence, or numpy.ndarray) – Latitudes of the receiver points
- lon (number, sequence, or numpy.ndarray) – Longitudes of the receiver points
Returns: altitude – Topographic altitude (km)
Return type: numpy.ndarray
References
[1] Topography for Earth-to-space propagation modelling: https://www.itu.int/rec/R-REC-P.1511/en