Skip to content

Commit

Permalink
Address comments
Browse files Browse the repository at this point in the history
  • Loading branch information
BenjaminPelletier committed Dec 18, 2023
1 parent 101c584 commit 98e40a8
Show file tree
Hide file tree
Showing 2 changed files with 19 additions and 5 deletions.
18 changes: 16 additions & 2 deletions monitoring/uss_qualifier/requirements/uspace/article8.md
Original file line number Diff line number Diff line change
@@ -1,7 +1,21 @@
# U-space Article 8: Network Identification Service
# [U-space Article 8](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32021R0664&qid=1702917443967#d1e905-161-1): Network Identification Service

## Article 8(2)(c)

_The network identification service shall allow for the authorised users to receive messages with the geographical position of the UAS, its altitude above mean sea level and its height above the surface or take-off point._
> The network identification service shall allow for the authorised users to receive messages with the geographical position of the UAS, its altitude above mean sea level and its height above the surface or take-off point.
<tt>MSLAltitude</tt>: Authorised users must receive messages with UAS altitude above mean sea level.

## Article 8(4)

> The authorised users shall be:
>
> (a) the general public as regards information that is deemed public in accordance with applicable Union and national rules;
>
> (b) other U-space service providers in order to ensure the safety of operations in the U-space airspace;
>
> (c) the air traffic services providers concerned;
>
> (d) when designated, the single common information service provider;
>
> (e) the relevant competent authorities.
6 changes: 3 additions & 3 deletions monitoring/uss_qualifier/scenarios/uspace/netrid/msl.md
Original file line number Diff line number Diff line change
Expand Up @@ -2,17 +2,17 @@

## Description

Article 8(2)(c) specifies (emphasis added):
[Article 8](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32021R0664&qid=1702917443967#d1e905-161-1)(2)(c) specifies (emphasis added):

> The network identification service shall allow for the authorised users to receive messages with the geographical position of the UAS, its *altitude above mean sea level* and its height above the surface or take-off point.

ASTM F3411 provides geodetic altitude above the WGS84 ellipsoidal estimate of sea level, however AMC1 specifies:
ASTM F3411 provides geodetic altitude above the WGS84 ellipsoidal estimate of sea level, however [AMC1](https://www.easa.europa.eu/en/document-library/acceptable-means-of-compliance-and-guidance-materials/amc-and-gm-implementing) specifies:

> USSPs should convert the heights above the WGS 84 ellipsoid exchanged with the ASTM F-3411-22A standard to height above mean sea level (MSL) before providing it to the UAS operators.

GM1 further clarifies the desired definition of mean sea level:
[GM1](https://www.easa.europa.eu/en/document-library/acceptable-means-of-compliance-and-guidance-materials/amc-and-gm-implementing) further clarifies the desired definition of mean sea level:

> Wherever the flight altitude above sea level is required to be determined with the use of GNSS systems, it is recommended to use the EGM2008 or at least the EGM96 geoid models as the definition of mean sea level, as agreed with the competent authority.
Expand Down

0 comments on commit 98e40a8

Please sign in to comment.