Raspberry Pi Forums

Hi folks,

just wondering about the use of PyEphem in the Astro PI. The reading for the TLE is only valid for a period of time, so I wondered, in the depths of space (i.e. no network access) whether there was some way for an up to date reading to the supplied when a 3 hour program was to be kicked off?

Cheers in advance folks,

/Mark

Hi Mark

I'll be explaining this during the webinar (which your teacher will get an email about soon). But basically if you get chosen for space-flight a few minor modifications are made to your code to make it obey the Astro Pi MCP (Master Control Program). As part of those edits, if I see your code is using hard coded two-line element telemetry lines I update it to load the telemetry from a shared location which is kept up to date by our ground station in Switzerland.

So you can expect to be able to computer accurate ISS locations when your code runs.
I hope this helps!

Dave

Cheers (I am the "teacher", well, coderdojo mentor). That answer really helps us out!

Oh sorry!

Hi,
I have this error when I try to install ephem (sudo pip3 install pyephem) :

arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Ilibastro-3.7.6 -I/usr/include/python2.7 -c extensions/_libastro.c -o build/temp.linux-armv7l-2.7/extensions/_libastro.o
extensions/_libastro.c:3:20: fatal error: Python.h: Aucun fichier ou dossier de ce type
#include "Python.h"

compilation terminated.

error: command 'arm-linux-gnueabihf-gcc' failed with exit status 1


Somebody can help me?

Thank you,
David.

I normally just use So ephem as opposed to pyephem.
You might find that installing these two packages helps Please also check out the Mission Space Lab webinar which explains how to use it;
https://www.youtube.com/watch?v=WYjaAZcWIPg&t=7760

Hi

I am getting a similar install error. I have tried a few different solutions including the one suggested by Dave in the above post. I have also tried the suggestions on this page https://raspberrypi.stackexchange.com/q ... or-python3 . As I am new to Raspberry Pi I don't know how to run the command below as root

Update

I have now successfully installed Ephem. I updated and upgraded raspbian, https://www.raspberrypi.org/documentati ... pdating.md