Units in sgp4 orbital calculations

I'm doing a project to calculate vector positions of a satellite using the package sgp4. Given an input file, it's supposed to spit out a position vector in metres from the centre of the earth....

Severe Tomcat crash has me stumped

I'm pretty used to crashing my tomcat server. But I don't think I made any changes at all and seem to have broken it completely. Was working one min then not the next. I really hope someone can...

How to debug dalvikvm rejecting opcode?

How do I make sense of these errors? This is all the log cat releavant to the error. all others are GC type messages. 01-07 19:14:08.536: W/dalvikvm(5780): VFY: register2 v4-5 values 6,24 01-07...

Java Code gives different results on android

I have some code, running on the PC as just java code, it gives the answer I want (the right one). On android the same code gives very different answers. The code I am using was originally from...

Python SGP4 1.1 Calculating Incorrect Orbit

I am using the python SGP4 1.1 module to calculate the position and velocity of a MEO satellite. I'm noticing when compared against STK and JSatTrak that the returned values for position and...

Handling #include <folder/file.h> in C with makefiles

I am in the process of porting some code that was developed in the codeblocks IDE. I am transferring it to a Linux server where I can only use the command line to compile the code. The code is...

How to compare difference between two datatable of same format?

I am having two datatable having same no of columns. I have to check which Name is having a different group or subgroup in new datatable.(Using Linq) DataTableOLD CODE NAME GROUP...

Python coordinate transformation ECI to ECEF

I am using sgp4 python package (developed by Brandon Rhodes); I am inputting the TLE information for ISS(Zarya). I get the position of the satellite at a certain date, in the in ECI coordinate...

No rule to make target Makefile error in shell script?

I am new to shell script. I tried to run this makefile using shell script. But is giving me this error [email protected]:~/workspace$ sh test.sh make: Makefile: No such file or directory make: *** No...

Which should I use: Python-sgp4, PyEphem, python-skyfield

The landscape of Python tools that seem to accomplish the task of propagating Earth satellites/celestial bodies is confusing. Depending on what you're trying to do, PyEphem or Python-SGP4 may be...

outputs not matching from sgp4 in C++, pyephem and Heavens Above

I am trying to predict calculate the positions and predict passes of a LEO satellite from a TLE file. For convenience I just take the international space station. What I did so far, is to download...

How can I use skyfied to convert SGP4 TEME coordinate to ECEF?

I want to plot the satellite tracking on a map. So I use SGP4 1.4 with python .Input the TLE data, but the outdata is not what I want. So I want to convert the output data to the ECEF data and get...

How to install SGP4 V 1.4 package in Python 3.6

First post hear and relatively new coder. Trying to get this package: https://pypi.python.org/pypi/sgp4/ to work, only I have no idea what I'm doing. I'm not familiar with the file extension...

While Loop Issues - Python 3.6.4

I'm trying to write an azimuth/elevation calculator as an exercise to explore the astropy libraries. I'm quite new to Python and have run into trouble with a basic while loop within my...

Skyfield: achieve sgp4 results with 1 second periodicity for given time interval

I've implemented sgp4 algorithm using Skyfield in python. I need the position vector for 1 day time interval with 1 second periodicity. For that, I have to calculate the sgp4 repeatedly, adding 1...

Efficient way to propagate satellite catalog over time

Problem statement I need to propagate the entire catalog of recent TLEs (need a free account to view) from space-track.org using skyfield or similar. There are typically 15k-16k TLEs in the list....

Deciphering error message to understand package conflict

A coworker sent me a yaml file with information regarding the environment he uses to run his python scripts. When I try to install the packages with anaconda, I get this error: Solving...

How to find my IDLE's Python, then apply pip upgrade to a package it uses?

I have two python 2.7's of interest: version with IDLE that came from https://www.python.org/downloads/ anaconda 2.7 installation I use MacOS. (I understand I'm overdue to switch to Python...

How to create an orbit of a satellite and animate it with SGP4 model?

I'm a beginner of Cesium and Javascript code. I need to create the orbit of a satellite (ESEO) around the globe. The satellite have to move according to SGP4 model. How can I create it in Cesium...

How to draw a line in Cesium Sandcastle between two points when one of them is moving?

I am using Cesium Sandcastle to visualize my scenario of a satellite moving on his orbit. I want to create a line between the satellite and the ground station to visualize the accesses. The...

How to use satellite.js in Angular 8 Project

I want to use SGP4/SDP4 calculations of satellite.js library to convert a TLE String and finally create a Satellite Orbit map. The Question is how can I add this library to my project? I already...

Why am i getting a difference between matlab's "lla2eci" and "sgp4.propagate"?

I am not experienced in this area but over the past few days I've put together some code in python that tracks (hopefully) the ISS. I've done the math and have that side of things working, but...

Undefined reference to 'cudaRegisterLinkedBinary' - linking error in CMake?

I'm running CentOS 7.8 via dual-boot on a 64-bit 2013 Mac with a GT 650M GPU. I'm using CMake 3.17, CUDA 10.0, and GCC 4.8.5. All CUDA samples have been tested and work fine, and I'm able to...