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workgroup:airspace:documentation:conceptual [2015/12/21 08:45]
Rob Garfoot Added security section
workgroup:airspace:documentation:conceptual [2016/01/04 09:00]
Rob Garfoot Added links to datum and a couple of lines in security y / identity
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 ===== Measurements ===== ===== Measurements =====
-All relative measurements MUST have a known origin / datum. This must either be specified or a standard documented origin / datum. All measurements MUST be specified at the appropriate scale and precision. E.g. using double precision millimeters (mm) for altitude would be better served by using single precision meters (m).+All relative measurements MUST have a known origin / [[datum]]. This must either be specified or a standard documented origin / [[datum]]. All measurements MUST be specified at the appropriate scale and precision. E.g. using double precision millimeters (mm) for altitude would be better served by using single precision meters (m).
  
 ==== Altitude ==== ==== Altitude ====
-Altitude measurements MAY specify a datum they are relative to. If ommitted, the measurements MUST be relatice ​to the WGS84 datum.+Altitude measurements MAY specify a [[datum]] they are relative to. If omitted, the measurements MUST be relative ​to the WGS84 [[datum]].
  
 ==== Elevation ==== ==== Elevation ====
-Elevation MUST be assumed relative to ground. In this instance the ground altitude MUST be the datum for the elevation and specified as per an altitude measurement.+Elevation MUST be assumed relative to ground. In this instance the ground altitude MUST be the [[datum]] for the elevation and specified as per an altitude measurement.
  
 ==== Latitude / Longitude ==== ==== Latitude / Longitude ====
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   * ADS-B transceiver   * ADS-B transceiver
  
-Each sensor type MUST be defined and have a known minimum set of capabilities. Where accuracy may vary from reading to reading, accuracy MUST be sent along with any sensor reading. This MUST supercede ​any accuracy sent as part of a sensor definition. ​+Each sensor type MUST be defined and have a known minimum set of capabilities. Where accuracy may vary from reading to reading, accuracy MUST be sent along with any sensor reading. This MUST supersede ​any accuracy sent as part of a sensor definition. ​
  
 Additionally the capabilities MAY include other custom elements. ​ Additionally the capabilities MAY include other custom elements. ​
  
 ===== Security ===== ===== Security =====
 +All communications MUST take place over a secure transport channel. E.g. TLS.
 +
 ==== Identity ==== ==== Identity ====
 +Certificate based? Provision for identity services with trusted CAs?
 +
 TBD TBD
workgroup/airspace/documentation/conceptual.txt ยท Last modified: 2016/09/19 06:37 by elle gonzalez