coordinate-systems

Astropy cross-matching unusall coordinates

Astropy cross-matching unusall coordinates Question: I want to cross-match two catalogs. But the Dec and RA coordinate data of these two catalogs are written as "h m s" and "d m s" (instead of being separated by a ":" a space separates them). RAJ2000 ———– 00 32 41.56 00 32 41.55 … That’s why I …

Total answers: 1

How to convert Earth Centered Inertial (ECI) coordinates to Earth Centered Earth Fixed (ECEF) AstroPy? Other?

How to convert Earth Centered Inertial (ECI) coordinates to Earth Centered Earth Fixed (ECEF) AstroPy? Other? Question: I have position (x,y,z) and velocity (Vx,Vy,Vz) vectors in Earth Centered Inertial Coordinates (ECI) for a satellite orbit, and ultimately want to end up with geodetic coordinates (Latitude, Longitude, & Altitude). According to this other Stack Overflow question …

Total answers: 2

Check if geo-point is inside or outside of polygon

Check if geo-point is inside or outside of polygon Question: I am using python and I have defined the latitudes and longitudes (in degrees) of a polygon on the map. My goal is to check if a generic point P of coordinates x,y falls within such polygon. I would like therefore to have a function …

Total answers: 4

Determining a homogeneous affine transformation matrix from six points in 3D using Python

Determining a homogeneous affine transformation matrix from six points in 3D using Python Question: I am given the locations of three points: p1 = [1.0, 1.0, 1.0] p2 = [1.0, 2.0, 1.0] p3 = [1.0, 1.0, 2.0] and their transformed counterparts: p1_prime = [2.414213562373094, 5.732050807568877, 0.7320508075688767] p2_prime = [2.7677669529663684, 6.665063509461097, 0.6650635094610956] p3_prime = [2.7677669529663675, 5.665063509461096, …

Total answers: 5