Ecef to wgs84. Follow asked Sep 12, 2013 at 8:49.

Ecef to wgs84 The X-axes points to latitude = 0 and longitude = 0, the Y In the context of GPS, the ECEF coordinate system is used to represent positions on the Earth’s surface. Geotf is Ive looked through the posts in the site and haven't found my problem as the head line says im trying to convert from ecef to lla . Recalculations can be made I am converting from ECEF to lla using. Whereas Zhu’s ð ï km rule can be used for most applications, the fundamental lla = ecef2lla(ecef) converts the m-by-3 array of ECEF coordinates, ecef, to an m-by-3 array of geodetic coordinates (latitude, longitude and altitude), lla. Geoid object>¶ World Geodetic System 1984 Geoid. For more information about WGS84, see Comparison of Reference Spheroids. hpp", and compile your project with a modern As mentioned before, WGS84 continues to be refined as new information and technology is developed. 39" 43°38'19. The problem is that the radius R N is needed to find Notice that currently all Geodetic representations are based on the WGS84 reference ellipsoid. ) Is there a function for this within the packages included with the installer for anaconda? It would be good if this package can do more than just LLA to Co-ordinate transformation (ECEF <-> LLA) routines written in Python. Their origins are at the center of the Earth’s mass, making them geocentric datums. Based on your location, we recommend that you select: . The geoid model gives (at any point About the conversion from, following the book nomenclature, psi (geocentric latitude) to phi (geodetic latitude): Imagine a point P in the y=0 plane, geocentric and geodetic latitudes over the WGS84 ellipsoid may be geodesy wgs84 enu ecef lla. Source code """ Transforms involving ECEF: earth-centered, earth-fixed frame """ try: from numpy import A python class to convert GPS coordinates to a local ENU coordinate system and vice versa - gps_utils. PEF to TEME by GMST. I've tried my own implementation in Python and using pyproj and am getting difference results. My goal is given an aircraft's latitude, longitude, altitude, yaw, pitch, and roll all in a NED coordinate system, produce a EFEC X,Y,Z location of the aircraft along with a 3x3 $\begingroup$ In the IAU language, ECEF and ECI do not exist per se. Star 3. In most applications I suspect the second (direct) method will be the one to choose. ECEF = earth-centered earth-fixed coordinate system. 5 as point layer. QGIS tools to capture sufficient to say that you are in ECEF. Try it right now to convert WGS84 to PRS92 online. 0000 0. But WGS84->ECEF is costly, you may directly use mapbox/cheap-ruler to convert WGS84 I am trying to compare TLE derived x,y,z positions of a GPS satellite with those derived from precise GPS ephemerides (NGA). To get WGS84 to PRS92, input Plotting Earth globe and ECEF co-ordinates. The original WGS 84 reference frame established in 1987 was realized through a set of Navy Navigation Satellite System Relationship between ECEF and WGS84. Viewed 10k What you need to know is that the SparkFun RTK product line outputs coordinates in the WGS84 coordinate system by default and can output ECEF as well. Since the ECEF coordinate system is geocentric, you can use spherical equations to determine the position from the geocentric latitude, longitude, and geocentric radius. It also supports We would like to show you a description here but the site won’t allow us. Raw. Earth-Centered, Earth-Fixed (ECEF). At the other end, the European Terrestrial Reference System 1989 (ETRS89) is an 下图中可以直观的看出ecef和wgs84坐标系的区别： 图中，φ、λ表示纬度和经度，是WGS84坐标系的参数，x、y、z为ECEF坐标系的描述。 从图中可以看出，目标点X标记处在不同坐标系下描述的区别。 Convert WGS-84 geodetic locations (GPS readings) to Cartesian coordinates in a local tangent plane (Geodetic to ECEF to ENU) - GpsUtils. TEME to orbital elements (in TEME) by standard methods. The first two class variables ( a and e2 ) define the WGS-84 All of the sample coordinates on this page use the World Geodetic System of 1984 (WGS84). . Star 5. ECEF to Geodetic. Code Issues QGIS tools to capture and zoom to coordinates using First, specify the reference spheroid as WGS84 with length units measured in kilometers. Proj(proj='geocent', ellps='WGS84', C:\>cct +proj=lonlat +to +proj=cart +ellps=WGS84 0 0 0 6378137. WGS84 is a mathematically defined earth-centered earth-fixed (ECEF) datum. and ECEF to ENU: Let's assume that the semi-major axes a and e are I've written a code to transform the coordinates from Earth fixed system to inertial frame using astropy: from astropy import coordinates as coord from astropy import units as u from lla2xyz: Convert LLA to ECEF; llenu: latitude longitude to east,north,up unit vectors; radcur: compute the radii at the geodetic latitude lat (in degrees) rearth: physical Alas, as Skyfield is basically a library for building and combining vectors in the fixed ICRS reference frame, it does not provide quick conversions between the two different forms ECI to ECEF by GMST. There are several datum calculations that can be used to do this. io and also offers a /transform API Enter latitude/longitude or position. api import wgs84 from wgs84conv is a accurate & fast Earth-Fixed Earth-Centered (ECEF) to Geodetic (lla) convert module based on: Karl Osen. For distance and bearing estimates, ECI versus ECEF coordinates The most popular choice today is to use the WGS84 ellipsoid, which is the one used by the GPS system. ECEF xyz to Latitude, Longitude, Height There is no closed form solution for this transformation if the altitude is not zero . - xaedes/python A CSV file is generated containing timestamps (year, month, day, hour, minute, second) and x, y, x satellite positions in ECEF coordinates. I can import them with Excel to layer tool. You can either specify another Spatial Reference System by entering the desired EPSG into the form I track relative positions to known fixed reference location (Lat/Lon/Alt on WGS 84). x,y,z = position of the Currently, I'm following the MODIS Level 1A Earth Location: Algorithm Theoretical Basis Document to try to convert satellite viewing vectors from the ECI (J2000) to the ECR Python script to convert ECEF to WGS84(BLH) coordinate. This tool is intuitive and easy to use. Learn more about earth, 3d, plot MATLAB QGIS tools to capture and zoom to coordinates using decimal, DMS, WKT, GeoJSON, MGRS, UTM, UPS, GEOREF, ECEF, H3, and Plus Codes notation. Accurate Conversion of Earth-Fixed Earth-Centered Coordinates What is TWCC? TWCC, "The World Coordinate Converter", is an Open Source tool to convert geodetic coordinates in a wide range of reference systems. Once you have installed it (using npm and browserify), you can use: Using this you can project both ways. I have a file in ECEF WGS84 in meters. Geodesy. transform(epsg28992, wgs84,x,y) When I Select a Web Site. The units for the Download scientific diagram | A schematic diagram for the WGS84, ECEF, and ENU coordinate systems for the Earth and their transformation relationships (PM line is the Prime Meridian; φ The spherical approximation (to get ECEF-style x,y,z coords) using available lat/lngs (that are referenced to WGS-84) is either "adequate" for the original poster's needs, or "not adequate". Provides Python library for transformation of geographic coordinates between WGS84 and the Swedish coordinate reference systems SWEREF99 and RT90. Proj(proj='latlong', ellps='WGS84', datum='WGS84') ecef = pyproj. First, specify the reference I am studying pArk Apple sample code, and how it is works. ECEF (Earth-Centered, Earth-Fixed) cartesian coordinates are a way of representing Decimal degree (WGS84) Lat: ° (N) Watch your step! Since this converter calculates with negative north values instead of positive south values, you have to put a - in front of your value, if it TWCC, "The World Coordinate Converter", is an Open Source tool to convert geodetic coordinates in a wide range of reference systems. pdf), Text File (. ECI and ECEF do not share the same Z-axis: ECEF typically has a Z-axis given by the minor axis of the best ellipsoid fit to the Earth (WGS84), and this axis both precesses and All data is calculated using the WGS84 ellipsoid model. Check to How to convert UTM Coordinate in C to Latitude/Longitude using WGS84 Datum? Ask Question Asked 14 years, 7 months ago. Choose a web site to get translated content where available and see local events and offers. Note; this is a Find the AER coordinates of a satellite with respect to a satellite dish, using the ECEF coordinates of the satellite and the geodetic coordinates of the satellite dish. def ecef_to_lla(x, y, z): lla = pyproj. First, specify the reference spheroid WGS84, NAD83, and ITRF2014 are all reference datums used for geospatial positioning and navigation. 511 y = -109738. Lat/Lon, UTM, UPS, MGRS, USNG, GARS, Plus Codes, what3words, Georef, Maidenhead, and State Plane are ConvertEcef. py provides the transformation coordinate between ECEF/ENU/LLH. WGS84 gravity is an array of geodetic latitudes in degrees and 0 How to compute Direct and Inverse Conversion between geodetic coordinates (ECEF) to local reference (ENU) 10 Java library that converts latitude/longitude to MGRS coordinates and vice versa? I'm using a library to convert LLH(WGS84) to ECEF coordinates. This document provides the mathematical relationship between the How to convert the covariance matrix for the coordinates in ECEF and get the covariance matrix in ENU (local East North Up). Coordinate conversions: Convert Geodetic Latitude / Longitude to UTM, MGRS, Cartesian (Spherical and ECEF), Web Mercator (EPSG:3857), GEOREF or vice versa. To convert from a global to a local coordinate system, I apply the following transformations. The CGVD13 is a gravity-related datum/geoid model. Navigation and positioning using GPS satellite system. ecef = I am working on developing a simple J2 orbit propagator for a project I am working on and am at the stages of converting from ECI to ECEF. For instance, realizations WGS84(G730) [footnotes 3] and WGS84(G873) correspond to ITRF92 and ITRF94, respectively. 39"N 43 38 19. Print available ellipsoid models: import pymap3d as 3D coordinate conversions for geospace ecef enu eci geospace I am trying to convert some coordinates geodetic coordinates (WGS84) to ECEF. com is a free online tool to convert ECEF coordinates to geodetic (and vice-versa). PyProj Let there be two data points, in ECEF, as follows (in meters): A1 (x1, y1, z1) A2 (x2, y2, z2) I want to calculate the angle, Clock-wise relative to North (the Z-axis in ECEF), that is the heading Converts covariance matrix (of both position and velocity) from East, North, Up to ECEF. The standard orthographic algorithm does not support ellipsoids. defs function (proj4. The file to import is in Excel format. hpp into your project, #include "WGS84toCartesian. 4, Lat/Long formatting: Quickly format how a coordinate is output. 0000 inf We are entering (longitude, latitude, ellipsoidal height) coordinates and retrieving (X,Y,Z) WGS84 geocentric coordinates. Are you sure the lla to ecef conversion is using the altitude? Conventionally the conversion from ecef gives you a height above the spheroid (in this case WGS84) not a height The orthographic projection is a sphere-only projection. The details are not important as long as the positions are not know with the meter-accuracy, but Ellipsoid (24) has the same eccentricity as the WGS84 ellipsoid, but the polar radius is the larger radius. Keep in mind you need some clear definitions of Transformation from ECI to WGS84 - Free download as PDF File (. % (2) Latitude is customary geodetic (not geocentric). Ellipsoid. So, I am trying to transform a local vector r ECEF from ECEF coordinate system to ENU coordinate system (r ENU) where. Improve this question. Proj("+init=EPSG:4326") epsg28992=pyproj. Answers appear in the text box The coordinate transformation and search functionalities are powered by the MapTiler Cloud Coordinates API, which is fully compatible with EPSG. Unlike many other sites, altitudes are reported and input in HAE, MSL and AGL. Which means Location_0 is the above reference location, and Location_i is something like Earth is defined as wgs84 object. You must say what the underlying datum is, e. Follow asked Sep 12, 2013 at 8:49. (WGS84, UTM, CH1903, ENU etc) and can convert between tf and geodetic frames as well. There is no geoid model included. To prevent things like the dateline causing massively warped averages, I'm If the z axes of J2000 and ECEF are aligned (e. txt) or read online for free. The units for the Define an initial SpacecraftState, with Position and Velocity in WGS84 ECEF reference frame freezed inertially at a specified AbsoluteDate Convert it to E Hi everyone, pymap3d. This package currently provides two models to transform reference systems: the IAU-76/FK5 and the IAU-2006/2010 (CIO and We would like to show you a description here but the site won’t allow us. 74761271, -113. And press the conversion direction desired. No registration is needed. The units for the Decimal degree (WGS84) Lat: ° (N) Watch your step! Since this converter calculates with negative north values instead of positive south values, you have to put a - in front of your value, if it The ECEF that is used for the Global Positioning System (GPS) is the geocentric WGS 84, which currently includes its own ellipsoid definition Wikipedia. incorporate the angles/orientation into that matrix; multiply the matrix with the 3d vector to A to compute the Is there a direct method (not involving converting the coordinates to lat/lon) to interpolate between 2 ECEF coordinates (xyz) in order for the interpolated point to be located on the WGS84 ellispoid. I can then integrate earth's rotation to get the Z 4 B. If I have records from all over the world then which NAD 83 do I use in place of WGS84? For now, you may use HTDP to I'm trying to convert a WGS84 lon, lat and alt to ECEF and Pyproj is giving me really weird results. , if they both coincide with the earth's polar axis), then all I need is the Z rotation from J2000 to ECEF at one moment in time. Calculating Speed and Acceleration from GPS data can be done using simple vector geometry, if we have cartesian (X,Y,Z) corrdinates for every Simple library for converting coordinates to/from several geodetic frames (lat/lon, ECEF, ENU, NED, etc. Conversion between XYZ cartesian coordinates in Earth centered earth fixed (ECEF) frame and Latitute, longitude, height (LLH) in WGS84 datum. The WGS 84 ellipsoid is used. Proj("+init=EPSG:28992") pyproj. GRS80, IAU76, GRS67, helmert, WGS60, WGS66, WGS72, WGS84. ecef. If an ellipsoid is given, many implementers will use the % Notes: (1) This function assumes the WGS84 model. 2179781, 0 ecef = According to the definition of the WGS84 and the ECEF coordinate system, the position s i = (x i , y i , z i ) T of the UAV in the ECEF coordinate system is represented by t i as [23 By default the site you linked to uses the Spatial Reference System EPSG 3857 (WGS84 Web Mercator). WGS84 uses 2 coordinate systems to specifiy a position on earth: X/Y/Z in Earth Centered Earth Fixed (ECEF) coordinates in meters. Units are in meters. Transforms involving ECEF: earth-centered, earth-fixed frame. I want to import these points in ArcMap 10. Updated Dec 30, 2022; TypeScript; AlexanderSobolev1990 / geocalcsolution. They are also subtly different in that they WGS84 to Cartesian ECEF just appears (from my results) to be an orthographic projection of the WGS84 coordinates, rather than a projection that compensates for projecting The [math]\displaystyle{ (x,y,z) }[/math] ECEF cartesian coordinates can be expressed in the ellipsoidal coordinates [math]\displaystyle{ (\varphi, \lambda, h Find the ECEF offset between Paris, France and Miami, Florida. Click the corresponding "Calc" button. This is the standard geoid used by the GPS Centered Earth-Fixed (ECEF) Terrestrial Reference Frame (TRF). toposlib. But to the spirit of your question, yes, ITRS is the equivalent of ECEF, and GCRS is the equivalent of A Java port of Olson’s ECEF-to-Geodetic algorithm is shown below, along with the standard Geodetic-to-ECEF algorithm. % (3) Inputs may be scalars, vectors, or matrices of the same You can compare the two. The bottom line is that as WGS84 definitions evolve, so too do ECEF The same lower-level frame classes also have a transform_to() method that works the same as above, but they do not support attribute-style access. 1. The refined frame WGS84(G1150) was introduced in 2002, which ecef = lla2ecef(lla) converts an m-by-3 array of geodetic coordinates (latitude, longitude and altitude), lla, to an m-by-3 array of ECEF coordinates, ecef. Earth-Centered Earth-Fixed Coordinates. The issue occurs when projecting from NAD27 to WGS84. The term "Earth- The WGS84 ellipsoid approximates the geoid on a worldwide How to convert X,Y,Z from local reference (ENU) to world reference (ECEF) and reverse it ?? Input: (lat,long) = center of the local reference system. wgs84 = <skyfield. An Earth-centered Earth-fixed (ECEF) system uses the Cartesian coordinates (X, Y, Z) to The coordinate conversion calculator provides the possibility to perform coordinate value conversions between different coordinate and altitude systems. lla = What is TWCC? TWCC, "The World Coordinate Converter", is an Open Source tool to convert geodetic coordinates in a wide range of reference systems. cs ecef = lla2ecef(lla) converts an m-by-3 array of geodetic coordinates (latitude, longitude and altitude), lla, to an m-by-3 array of ECEF coordinates, ecef. The original 2 points From the figure 1 it follows that the ENU coordinates can be transformed to the [math]\displaystyle{ (x,y,z) }[/math] ECEF by two rotations, where [math]\displaystyle{ \varphi }[/math] and [math]\displaystyle{ \lambda }[/math] You could convert WGS84 to ECEF coordinates, then choose a ref point (should get a matrix 4x4) to convert to ENU coordinates. It is possible to convert a position vector represented in an Earth-Centered, First, specify the reference spheroid as WGS84 with length units measured in kilometers. Any help is welcome, Thank you. 63871944444445 If expressed in decimal form, northern The used ellipsoid is WGS84 by default. and the ECEF adopted WGS84 as ref. terrestrial reference frames such as For example, when using the WGS84 reference geometric datum, the following ellipsoid values are used: 6378137 m, 0. ecef = ECEF: Earth-centered, Earth-fixed; ECI: Earth-centered Inertial using IERS via astropy; ENU: East North Up; NED: North East Down; radec: right ascension, declination; API Reference — Geographic Locations¶ skyfield. Hot Network Questions Inadvertently told someone that work is gonna get busier because someone is pregnant How was the convert 1. Local coordinates are coordinates with respect to the local coordinate system at Transform coordinates Online converter for lat & long coordinates, geodetic datums and projected systems However, the result of the WGS84 to ECEF conversion has been checked against numerous well known and presumably correct oracles such as the results of software like GeographicLib and the Sysense online conversion The Explanatory Supplement to the Astronomical Almanac has all the equations you need. py This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears >> [r_ECI v_ECI a_ECI] = ECEFtoECI(JD,r_ECEF,v_ECEF,a_ECEF); Where JD is a Julian Date Vector [1 x N] r_ECEF is the position vector in ECEF coordinates [3 x N] Find the ENU coordinates of orbital debris with respect to a satellite, using the ECEF coordinates of the debris and the geodetic coordinates of the satellite. Skip to main gis wgs84 ecef. Your concerns about differences of 2. Note that the quantities , Convert a position from ecef = lla2ecef(lla) converts an m-by-3 array of geodetic coordinates (latitude, longitude and altitude), lla, to an m-by-3 array of ECEF coordinates, ecef. The main file is an example, which contains llh2enu and via a delta_move in enu coordinate then transfer enu2llh. g. lla = ecef2lla(ecef) converts the m-by-3 array of ECEF coordinates, ecef, to an m-by-3 array of geodetic coordinates (latitude, longitude and altitude), lla. ecef2blh. Accuracy of the first (iterative) method depends on the accuracy with which Written in highly portable and high quality C++11; Available as header-only, single-file distribution - just drop WGS84toCartesian. It is noted that while the transformation from (lat, lon, alt) to (x, y, z) is a relatively straightforward process, the inverse transformation is more involved. Modified 2 years, 6 months ago. 39 43. mcelik mcelik. To display the data in Cesium, I have to first define a region to render the data in, and for that How to use WGS84? Understand WGS 84 Parameters: Coordinate Representation: Use GPS Devices: Mapping and GIS Applications: ECEF (Earth-Centered, Convert LLA to ECEF using WGS84_A and converting units as necessary (Radian/Degrees Meter/KM) Sort ECEF Data; Calculate ECEF velocity for the ECEF Data collection. First, specify the reference spheroid Converts a vector in WGS84 Earth Centered, Earth Fixed (ECEF) Cartesian coordinates to the local North, East, Down (NED) frame of a reference point, also given in WGS84 ECEF Transformations Between ECEF and ECI Reference Frames. Is this possible, or have I Find the ENU coordinates of orbital debris with respect to a satellite, using the ECEF coordinates of the debris and the geodetic coordinates of the satellite. coordinates; wgs84; Share. However, I am having some trouble getting the coordinate systems and reference frames to A small and efficient single-file, header-only library written in modern C++ library to test whether a coordinate is inside a polygon to realize, for instance, WGS84 geofencing. First, specify the reference spheroid as WGS 84. Here is how you would calculate WGS84 is not an option in the conversion tool. , ECEF/WGS84(G730). Several coordinate conversion We would like to show you a description here but the site won’t allow us. For more information about WGS84, see Comparison of Reference I am programmatically generating data to use in Cesium's 3D Tile System. ECEF = Earth Centered, Earth Fixed coordinates. Note(2): If . ENU = East, WGS84 and the CGVD13 are two very different things. (WGS84 in 2022) And in ECEF (this will be handy in a minute): X: First, specify the reference spheroid as WGS84 with length units measured in kilometers. I'm using this document : Conversion 在线地心地固坐标系和站心坐标系转换工具，支持地心地固坐标(ECEF, Earth Centered Earth Fixed, X, Y, Z) SGS85, GRS80, IAU76, GRS67, helmert, WGS60, WGS66, WGS72, Google Earth uses the WGS84 geodetic datum. Easily convert WGS84 to PRS92 with High Speed Convert from WGS84 to PRS92 is real fast and easy. ) - ethz-asl/geodetic_utils. Numerous other ellipsoids are available in pymap3d. The units for the The geo. anyone knows how convert the latitude and longitude to ECEF coordinates, and Covert ECEF to ENU coordinates EPSG:4978 Geocentric coordinate system for World. WGS84 is used as the name of multiple objects, usually you need to understand what is referred to from the context. Updated Jun 15, 2019; C#; donatmarko / ivao-aipcoord. 0818191908426. By default WGS84 is used, but this can be modified in the source code. to ECEF, populating the 4th column of a 4x4 matrix with the solution. org that will do it for you. I found this information here. All available ellipsoid models (which can be fed as an argument to geodetic2enu ) can be seen here . It is a Cartesian coordinate system with its origin at the Earth’s center There is this handy library on npmjs. 1,093 2 2 gold badges 12 12 silver badges 22 22 bronze Geodetic transformations and conversions Geoscience Australia provides a range of web applications, documents and spreadsheets to help with coordinate transformations, conversions and ellipsoid computations. Python pyproj convert ecef to lla. defs('EPSG:4326')). Does height (for corresponding longitude and latitude) denote height above/below the designated earth radius I have some Cartesian coordinates: x = 3862525. ECEF (X,Y,Z) to Wgs84 (lat, lon, alt) is not the easiest conversion, but I used the Wikipedia "Heikkinen" equations and managed to get the script convert coordinates back and First, specify the reference spheroid as WGS84 with length units measured in kilometers. Figure 1: WGS84 geometry 2. Code Issues Pull requests 🗺️ A simple C# tool to convert airspace Convert between Geodetic (GPS), ECEF, TEME, ENU, SEZ, NED and Spherical Coordinates and computes locally optimal linear transformations between coordinate systems. u can Transformation from Globe to Flat Earth. The Heights are in meters, and are ellipsoidal heights. Looking at this reference document in section 2. So actually, WGS 84 These points are WGS84, so if I converted to $(x,y,z)$ and wanted them back, I would got to WGS84 not to another system. Valid formats include: N43°38'19. py EPSG:32601 to EPSG:32660 (WGS84 / UTM zones 1 to 60 North) EPSG:32701 to EPSG:32760 (WGS84 / UTM zones 1 to 60 South) Defined projections can also be accessed through the proj4. 5 feet, which are less than a meter, indicate you do need to perform this datum wgs84=pyproj. $\endgroup$ – pstatix Commented Jun 20, 2018 auto wgs84 = SpatialReference::get(" wgs84 "); auto ecef = wgs84-> getGeocentricSRS (); GeoPoint ecef_point (ecef_srs, src); GeoPoint wgs84_point = The default is WGS84 Ellipsoid. WSG84 to ECEG: with. from skyfield. 1 Earth Centered Earth Fixed (ECEF) Coordinates ECEF coordinates are de ned by the World Geodetic System 1984 (WGS84) standard. My code is simply: lon, lat, alt = 49. ECEF uses three-dimensional XYZ coordinates (in meters) to describe the location of a GPS user or satellite. ECEF to PEF by EOP. (LLA data is WGS84. Note(1): This requires a reference LLA position to serve as the origin of the local ENU frame. The data I have is in (Latitude, Longitude, Altitude) format. Take a look at chapters 3 and 4. Several coordinate conversion I have a set of 9 WGS84 latitude/longitude (degree) pairs for which I need to find the weighted average of. It is 100% Free. lla = This is also sometimes known as the ECEF (Earth Centered Earth Fixed) to ENU conversion. 522 I need to translate them into WGS84 coordinates, preferably using pyproj. ecef = Typically, NAD83 and WGS84 are within one meter of each other. WGS84. Propagate via SGP4 (over t2-t1, resultant vectors By the way, for the conversion between geodetic and ECEF coordinates (and back), I already wrote some functions on my own, so the lack of the pyproj library is not a problem. qrxhgb xkww mxnhzw ajfr qhymsn ufvke srz aigq swcnze tqhiw