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: http://www.stsci.edu/~sontag/spicedocs/cspice/bodc2n_c.html
Дата изменения: Sat Dec 17 06:08:29 2005 Дата индексирования: Sun Apr 10 23:57:00 2016 Кодировка: Поисковые слова: m 11 |
Translate the SPICE integer code of a body into a common name for that body.
NAIF IDs
Variable I/O Description -------- --- -------------------------------------------------- code I Integer ID code to be translated into a name. lenout I Maximum length of output name. name O A common name for the body identified by code. found O True if translated, otherwise false.
code is an integer code for a body --- a planet, satellite, barycenter, spacecraft, asteroid, comet, or other ephemeris object. lenout is the maximum allowed length of the output name, including the terminating null character. For example, if the caller wishes to be able to accept a 32-character name, lenout must be set to (at least) 33. The current maximum name length is 32 characters, so a value of 33 for lenout will suffice.
name is a common name of the body identified by code. If code has more than one translation, then the most recently defined name corresponding to code is returned. 'name' will have the exact format (case and blanks) as when the name/code pair was defined. No more than lenout characters, including the terminating null, will be written to name. A terminating null will always be written. found is SPICETRUE if code has a translation. Otherwise, found is SPICEFALSE.
None.
bodc2n_c is one of three related subroutines, bodn2c_c Body name to code bodc2n_c Body code to name boddef_c Body name/code definition bodn2c_c and bodc2n_c perform translations between body names and their corresponding integer ID codes which are used in SPK and PCK files and routines. A set of name/code pairs are automatically defined during the first call to one of these subroutines. Additional name/code pairs may be defined via boddef_c.
1. Suppose you ran the utility program SPACIT to summarize an SPK ephemeris file and the following data was output to the terminal screen. ---------------------------------------------------------- Segment identifier: JPL archive 21354 Body : -77 Center : 399 From : 1990 DEC 08 18:00:00.000 To : 1990 DEC 10 21:10:00.000 Reference : DE-200 SPK Type :1 ---------------------------------------------------------- You could write a program to translate the body codes shown in the SPACIT output: #define MAXLEN 32 . . . bodc2n_c ( -77, MAXLEN, body, found ); bodc2n_c ( 399, MAXLEN, center, found ); if ( found ) { printf ( "body: -77 = %s\n", body ); printf ( "center: 399 = %s\n", center ); } You could also read the body and center codes directly from the SPK files, using the appropriate DAF routines, and then translate them, as above. 2. In this example, we assume that boddef_c has not been called, so only the set of default name/code pairs has been defined. Given these names, bodn2c_c will return the following codes: Name Code Found? ------------------------ ------ ------ "EARTH" 399 Yes " Earth " 399 Yes "EMB" 3 Yes "Solar System Barycenter" 0 Yes "SolarSystemBarycenter" - No "SSB" 0 Yes "Voyager 2" -32 Yes "U.S.S. Enterprise" - No " " - No "Halley's Comet" - No Given these codes, bodc2n_c will return the following names: Code Name Found? ------- ------------------- ------ 399 "EARTH" Yes 0 "SOLAR SYSTEM BARYCENTER" Yes 3 "EARTH BARYCENTER" Yes -77 "GALILEO ORBITER" Yes 11 - No -1 - No
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1) If the output string pointer is null, the error SPICE(NULLPOINTER) is signaled. 2) If the output string has length less than two characters, it is too short to contain one character of output data plus a null terminator, so it cannot be passed to the underlying Fortran routine. In this event, the the error SPICE(STRINGTOOSHORT) is signaled.
None.
N.J. Bachman (JPL) K.R. Gehringer (JPL)
None.
-CSPICE Version 2.2.0, 02-SEP-1999 (NJB) Local type logical variable now used for found flag used in interface of bodc2n_. -CSPICE Version 2.1.1, 25-MAR-1998 (EDW) Minor corrections to header. -CSPICE Version 2.1.0, 09-FEB-1998 (NJB) Re-implemented routine without dynamically allocated, temporary strings. Updated the Exceptions header section. -CSPICE Version 2.0.1, 16-JAN-1998 (EDW) Corrected and clarified header entries. -CSPICE Version 1.0.0, 25-OCT-1997 (NJB) Based on SPICELIB Version 1.0.0, 23-JAN-1996 (KRG)
body id code to name