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# SIDS (Simple Downlink Share) Convention
## context
SIDS protocole has been issued for the UWE3 satellite by the University of Würzburg (Germany).
This protocole has been used by diffent project
- [Satnogs](https://satnogs.org/)
- [Picsat](https://picsat.obspm.fr/)
-
- AMSAT-F Database
Different tools are compatible with this protocole
- [Online Telemetry Forwarder](https://www.satblog.info/software/) ( from DK3WN )
- [gr_satellites](https://github.com/daniestevez/gr-satellites)
- [r2cloud](https://github.com/dernasherbrezon/r2cloud)
- [satnogs](https://satnogs.org/)
## SIDS field description
| Field | Type | Required| Description | Example |
| ------------ | ------------ | ------------ | ------------ | ------------ |
| noradID | Integer | yes | Norad ID of the spacecraft | 39446 |
| source | String | yes | e.g. Callsign of the receiver | DK3WN |
| timestamp | String | yes | UTC timestamp (see ISO 8601) | 2014-05-01T10:21:33.560Z |
| frame | HEXString | yes | Received binary data as hexadecimal string. Whitespaces are optional | 88 88 60 AA... |
| locator | String | yes | Type of the given receiver's location. Currently only 'longLat' is supported which defines the WGS84 standard | longLat |
| longitude | String | yes | Longitude of the receiver's location (WGS84) | 8.95564E |
| latitude | String | yes | Latitude of the receiver's location (WGS84) | 49.73145N |
| tncPort | Integer | no | Port at which the packet was received (e.g.the defined Channel in the KISS packet) | 0 |
| azimuth | Float | no | Azimuth degree of a directional antenna (if available) | 10.5 |
| elevation | Float | no | Elevation degree of a directional antenna (if available)| 85.0 |
| fDown | Integer | no | Frequency of the transceiver's downlink channel during the receive (with doppler!)| 436399000 |
## URL formation
Exemple : BASIC_URL?PARAM_1=VALUE_1&PARAM_2=VALUE_2&...
## references
- documentation
- https://www.pe0sat.vgnet.nl/decoding/tlm-decoding-software/sids/
-