`; ; NOSA HEADER START ; ; The contents of this file are subject to the terms of the NASA Open ; Source Agreement (NOSA), Version 1.3 only (the "Agreement"). You may ; not use this file except in compliance with the Agreement. ; ; You can obtain a copy of the agreement at ; docs/NASA_Open_Source_Agreement_1.3.txt ; or ; https://sscweb.gsfc.nasa.gov/WebServices/NASA_Open_Source_Agreement_1.3.txt. ; ; See the Agreement for the specific language governing permissions ; and limitations under the Agreement. ; ; When distributing Covered Code, include this NOSA HEADER in each ; file and include the Agreement file at ; docs/NASA_Open_Source_Agreement_1.3.txt. If applicable, add the ; following below this NOSA HEADER, with the fields enclosed by ; brackets "[]" replaced with your own identifying information: ; Portions Copyright [yyyy] [name of copyright owner] ; ; NOSA HEADER END ; ; Copyright (c) 2013-2025 United States Government as represented by the ; National Aeronautics and Space Administration. No copyright is claimed ; in the United States under Title 17, U.S.Code. All Other Rights ; Reserved. ; ; ;+ ; This file contains a procedure-oriented wrapper to a subset of ; functionality from the SpdfSsc class (IDL client interface to ; <a href="https://sscweb.gsfc.nasa.gov/WebServices"> ; Satellite Situation Center Web Services</a> (SSC WSs)) library. ; ; @copyright Copyright (c) 2013-2025 United States Government as ; represented by the National Aeronautics and Space ; Administration. No copyright is claimed in the United States ; under Title 17, U.S.Code. All Other Rights Reserved. ; ; @author B. Harris ;- ;+ ; This function gets basic location information for a single satellite ; from <a href="https://www.nasa.gov/">NASA</a>'s ; <a href="https://spdf.gsfc.nasa.gov/">Space Physics Data Facility</a> ; <a href="https://sscweb.gsfc.nasa.gov/">Satellite Situation Center</a>. ; More comprehensive information if available by using ; <code>SpdfSsc::getLocations()</code>. ; ; @param satellite {in} {type=string} ; identifies the satellite whose location is to be gotten. ; @param timeSpan {in} {type=strarr(2)} ; ISO 8601 format strings of the start and stop times of the ; data to get. ; @keyword coordinateSystem {in} {optional} {type=string} ; {default='Gse'} ; specifies the coordinate system. Must be one of the ; following values: Geo, Gm, Gsm, Sm, GeiTod, or GeiJ2000. ; @keyword resolutionFactor {in} {optional} {type=int} {default=1} ; resolution factor. A value of 3 will return every third ; point. ; @keyword endpoint {in} {optional} {type=string} ; {default='https://sscweb.gsfc.nasa.gov/WS/sscr/2'} ; URL of SSC web service. ; @keyword quiet {in} {optional} {type=boolean} {default=false} ; SpdfGetLocations normally prints an error message if no ; data is found. If QUIET is set, no error messages is ; printed. ; @keyword httpErrorReporter {in} {optional} ; {type=SpdfHttpErrorReporter} ; used to report an HTTP error. ; @keyword sslVerifyPeer {in} {optional} {type=int} {default=1} ; Specifies whether the authenticity of the peer's SSL ; certificate should be verified. When 0, the connection ; succeeds regardless of what the peer SSL certificate ; contains. ; @returns SpdfLocations object containing requested data. ; @examples ; <pre> ; l = spdfGetLocations('ace', ; ['2013-01-01T00:00:00.000Z', '2013-01-03T00:00:00.000Z']) ; p = plot3d(l->getX(), l->getY(), l->getZ(), window_title='Orbit') ; </pre> ;- function SpdfGetLocations, $ satellite, $ timeSpan, $ coordinateSystem = coordinateSystem, $ resolutionFactor = resolutionFactor, $ endpoint = endpoint, $ quiet = quiet, $ httpErrorReporter = httpErrorReporter, $ sslVerifyPeer = sslVerifyPeer compile_opt idl2 if keyword_set(coordinateSystem) then begin coordinateSystem = $ spdfFixCoordinateSystemCase(coordinateSystem) if coordinateSystem eq '' then begin if ~keyword_set(quiet) then begin print, 'Invalid coordinateSystem value' endif return, obj_new() endif endif else begin coordinateSystem = 'Gse' endelse if ~keyword_set(resolutionFactor) then begin resolutionFactor = 1 endif ssc = obj_new('SpdfSsc', $ endpoint = endpoint, $ userAgent = 'SpdfGetLocations', $ sslVerifyPeer = sslVerifyPeer) timeInterval = $ obj_new('SpdfTimeInterval', timeSpan[0], timeSpan[1]) if ~keyword_set(httpErrorReporter) then begin httpErrorReporter = obj_new('SpdfHttpErrorReporter') endif sats = objarr(1) sats[0] = obj_new('SpdfSatelliteSpecification', satellite, $ resolutionFactor) coordinateOptions = objarr(5) coordinateOptions[0] = $ obj_new('SpdfCoordinateOptions', coordinateSystem, 'X') coordinateOptions[1] = $ obj_new('SpdfCoordinateOptions', coordinateSystem, 'Y') coordinateOptions[2] = $ obj_new('SpdfCoordinateOptions', coordinateSystem, 'Z') coordinateOptions[3] = $ obj_new('SpdfCoordinateOptions', coordinateSystem, 'Lat') coordinateOptions[4] = $ obj_new('SpdfCoordinateOptions', coordinateSystem, 'Lon') outputOptions = $ obj_new('SpdfOutputOptions', coordinateOptions) locationRequest = $ obj_new('SpdfSscDataRequest', $ timeInterval, $ sats, $ outputOptions, $ description = 'Locator request.') locations = $ ssc->getLocations( $ locationRequest, $ httpErrorReporter = httpErrorReporter) if ~obj_valid(locations) then begin if ~keyword_set(quiet) then begin print, 'getLocations returned null' endif return, obj_new() endif statusCode = locations->getStatusCode() if statusCode eq 'Error' then begin if ~keyword_set(quiet) then begin print, 'status: ', statusCode subCode = locations->getStatusSubCode() print, 'statusSubCode: ', subCode statusText = locations->getStatusText() print, 'statusText: ', statusText endif return, obj_new() endif data = locations->getData() if ~obj_valid(data[0]) then begin if ~keyword_set(quiet) then begin print, 'No data returned' print, 'status: ', statusCode subCode = locations->getStatusSubCode() print, 'statusSubCode: ', subCode statusText = locations->getStatusText() print, 'statusText: ', statusText endif return, obj_new() endif id = data[0]->getId() time = data[0]->getTime() coordData = data[0]->getCoordinateData() coordinateSystem = coordData->getCoordinateSystem() x = coordData->getX() y = coordData->getY() z = coordData->getZ() lat = coordData->getLatitude() lon = coordData->getLongitude() localTime = coordData->getLocalTime() return, obj_new('SpdfLocations', $ id, time, coordinateSystem, $ x = x, y = y, z = z, $ latitude = lat, longitude = lon, localTime = localTime) end ;+ ; Corrects the case of the given value. ; ; @private ; ; @param coordinateSystem {in} {type=string} ; a coordinate system identifier. ; @returns a coordinate system identifier with the correct (camel) ; case. If the input value cannot be mapped to a valid coordinate ; system value, then an empty string ('') is returned. ;- function spdfFixCoordinateSystemCase, $ coordinateSystem compile_opt idl2 case strlowcase(coordinateSystem) of 'geo' : return, 'Geo' 'gm' : return, 'Gm' 'gse' : return, 'Gse' 'gsm' : return, 'Gsm' 'sm' : return, 'Sm' 'geitod' : return, 'GeiTod' 'geij2000': return, 'GeiJ2000' else : return, '' endcase end`