AeroRust's "Are we in space yet?" catalogue and no_std support

[elpiel]

Hello,
I'm the community manager of the AeroRust community and while researching different crates for orbital determination and propagation I landed on your project.

We have an ongoing effort to create a catalogue of crates related to aerospace.
I'd love to see sgp4 added to the Are we in space yet? catalogue - https://aerorust.org/catalogue/.
You can find sgp4 and other crates for addition to the website here - AeroRust/AeroRust.github.io#6
The categories are still a Work in progress and any additions/alterations are welcome.

On another note, I would love to see whether no_std is possible for the sgp4 crate at this stage and if all dependencies are needed to minimise the crate size for use in embedded.

[aMarcireau]

Hello,

That sounds like an exciting project! Do I need to do anything to add SGP4 to the Are we in space yet? catalogue?

no_std is possible in principle, but challenging because SGP4 uses trigonometric functions. These functions depend on the host OS for the moment. The following issue tracks ongoing efforts and suggested workarounds: rust-lang/rfcs#2505. However, the workarounds are platform-dependent.

[elpiel]

Hello,

That sounds like an exciting project! Do I need to do anything to add SGP4 to the Are we in space yet? catalogue?

no_std is possible in principle, but challenging because SGP4 uses trigonometric functions. These functions depend on the host OS for the moment. The following issue tracks ongoing efforts and suggested workarounds: rust-lang/rfcs#2505. However, the workarounds are platform-dependent.

Catalogue addition

To add the crate you must update the scraper/config.toml file and define the categories in which sgp4 is part of ( astrodynamics I suppose). More details can be found in the issue - AeroRust/AeroRust.github.io#6

no_std

In the nmea crate we've used the num crate to add support for f32/f64 functions that are not included in core and it does support no_std - https://docs.rs/num/latest/num/trait.Float.html
You can rely only on the num-traits in this scenario.

https://github.com/AeroRust/nmea/blob/b73418af5bb61400e91c27bb3aa6103573fc182d/src/sentences/utils.rs#L14-L16

https://github.com/AeroRust/nmea/blob/b73418af5bb61400e91c27bb3aa6103573fc182d/src/sentences/utils.rs#L44

[elpiel]

Thanks again for adding this amazing crate to the list.