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A library for reading and writing seismic file formats in java.
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package edu.sc.seis.seisFile.sac;
/**
* Constants useful for SAC files.
*/
public class SacConstants {
public static boolean isUndef(float f) {
return f == FLOAT_UNDEF;
}
public static boolean isUndef(int i) {
return i == INT_UNDEF;
}
public static boolean isUndef(String s) {
return (s.length() == 8 && s.equals(STRING8_UNDEF)) ||
(s.length() == 16 && s.equals(STRING16_UNDEF));
}
// undef values for sac
public static final float FLOAT_UNDEF = -12345.0f;
public static final int INT_UNDEF = -12345;
public static final String STRING8_UNDEF = "-12345 ";
public static final String STRING16_UNDEF = "-12345 ";
public static final int DEFAULT_NVHDR = 6;
/* TRUE and FLASE defined for convenience. */
public static final int TRUE = 1;
public static final int FALSE = 0;
/* Constants used by sac. This corresponds to utils/sac.h in sac 101.4 */
/** Undocumented */
public static final int IREAL = 0;
/** Time series file */
public static final int ITIME = 1;
/** Spectral file-real/imag */
public static final int IRLIM = 2;
/** Spectral file-ampl/phase */
public static final int IAMPH = 3;
/** General x vs y file */
public static final int IXY = 4;
/** Unknown */
public static final int IUNKN = 5;
/** Displacement (NM) */
public static final int IDISP = 6;
/** Velocity (NM/SEC) */
public static final int IVEL = 7;
/** Acceleration (NM/SEC/SEC) */
public static final int IACC = 8;
/** Begin time */
public static final int IB = 9;
/** GMT day */
public static final int IDAY = 10;
/** Event origin time */
public static final int IO = 11;
/** First arrival time */
public static final int IA = 12;
/** User defined time pick 0 */
public static final int IT0 = 13;
/** User defined time pick 1 */
public static final int IT1 = 14;
/** User defined time pick 2 */
public static final int IT2 = 15;
/** User defined time pick 3 */
public static final int IT3 = 16;
/** User defined time pick 4 */
public static final int IT4 = 17;
/** User defined time pick 5 */
public static final int IT5 = 18;
/** User defined time pick 6 */
public static final int IT6 = 19;
/** User defined time pick 7 */
public static final int IT7 = 20;
/** User defined time pick 8 */
public static final int IT8 = 21;
/** User defined time pick 9 */
public static final int IT9 = 22;
/** Radial (NTS) */
public static final int IRADNV = 23;
/** Tangential (NTS) */
public static final int ITANNV = 24;
/** Radial (EVENT) */
public static final int IRADEV = 25;
/** Tangential (EVENT) */
public static final int ITANEV = 26;
/** North positive */
public static final int INORTH = 27;
/** East positive */
public static final int IEAST = 28;
/** Horizontal (ARB) */
public static final int IHORZA = 29;
/** Down positive */
public static final int IDOWN = 30;
/** Up positive */
public static final int IUP = 31;
/** LLL broadband */
public static final int ILLLBB = 32;
/** WWSN 15-100 */
public static final int IWWSN1 = 33;
/** WWSN 30-100 */
public static final int IWWSN2 = 34;
/** High-gain long-period */
public static final int IHGLP = 35;
/** SRO */
public static final int ISRO = 36;
/** Nuclear event */
public static final int INUCL = 37;
/** Nuclear pre-shot event */
public static final int IPREN = 38;
/** Nuclear post-shot event */
public static final int IPOSTN = 39;
/** Earthquake */
public static final int IQUAKE = 40;
/** Foreshock */
public static final int IPREQ = 41;
/** Aftershock */
public static final int IPOSTQ = 42;
/** Chemical explosion */
public static final int ICHEM = 43;
/** Other */
public static final int IOTHER = 44;
/** Good */
public static final int IGOOD = 45;
/** Gliches */
public static final int IGLCH = 46;
/** Dropouts */
public static final int IDROP = 47;
/** Low signal to noise ratio */
public static final int ILOWSN = 48;
/** Real data */
public static final int IRLDTA = 49;
/** Velocity (volts) */
public static final int IVOLTS = 50;
/** General XYZ (3-D) file */
public static final int IXYZ = 51;
/* These 18 added to describe magnitude type and source maf 970205 */
/** Bodywave Magnitude */
public static final int IMB = 52;
/** Surface Magnitude */
public static final int IMS = 53;
/** Local Magnitude */
public static final int IML = 54;
/** Moment Magnitude */
public static final int IMW = 55;
/** Duration Magnitude */
public static final int IMD = 56;
/** User Defined Magnitude */
public static final int IMX = 57;
/** INEIC */
public static final int INEIC = 58;
/** IPDEQ */
public static final int IPDEQ = 59;
/** IPDEW */
public static final int IPDEW = 60;
/** IPDE */
public static final int IPDE = 61;
/** IISC */
public static final int IISC = 62;
/** IREB */
public static final int IREB = 63;
/** IUSGS */
public static final int IUSGS = 64;
/** IBRK */
public static final int IBRK = 65;
/** ICALTECH */
public static final int ICALTECH = 66;
/** ILLNL */
public static final int ILLNL = 67;
/** IEVLOC */
public static final int IEVLOC = 68;
/** IJSOP */
public static final int IJSOP = 69;
/** IUSER */
public static final int IUSER = 70;
/** IUNKNOWN */
public static final int IUNKNOWN = 71;
/* These 17 added for ievtyp. maf 970325 */
/** Quarry or mine blast confirmed by quarry */
public static final int IQB = 72;
/** Quarry or mine blast with designed shot information-ripple fired */
public static final int IQB1 = 73;
/** Quarry or mine blast with observed shot information-ripple fired */
public static final int IQB2 = 74;
/** Quarry or mine blast - single shot */
public static final int IQBX = 75;
/** Quarry or mining-induced events: tremors and rockbursts */
public static final int IQMT = 76;
/** Earthquake */
public static final int IEQ = 77;
/** Earthquakes in a swarm or aftershock sequence */
public static final int IEQ1 = 78;
/** Felt earthquake */
public static final int IEQ2 = 79;
/** Marine explosion */
public static final int IME = 80;
/** Other explosion */
public static final int IEX = 81;
/** Nuclear explosion */
public static final int INU = 82;
/** Nuclear cavity collapse */
public static final int INC = 83;
/** Other source of known origin */
public static final int IO_ = 84;
/** Local event of unknown origin */
public static final int IL = 85;
/** Regional event of unknown origin */
public static final int IR = 86;
/** Teleseismic event of unknown origin */
public static final int IT = 87;
/** Undetermined or conflicting information */
public static final int IU = 88;
/* These 9 added for ievtype to keep up with database. maf 000530 */
/** Damaging Earthquake */
public static final int IEQ3 = 89;
/** Probable earthquake */
public static final int IEQ0 = 90;
/** Probable explosion */
public static final int IEX0 = 91;
/** Mine collapse */
public static final int IQC = 92;
/** Probable Mine Blast */
public static final int IQB0 = 93;
/** Geyser */
public static final int IGEY = 94;
/** Light */
public static final int ILIT = 95;
/** Meteroic event */
public static final int IMET = 96;
/** Odors */
public static final int IODOR = 97;
public static final int data_offset = 632;
public static final int NVHDR_OFFSET = 76 * 4;
public static final int NPTS_OFFSET = 79 * 4;
public static final boolean SunByteOrder = true;
public static final boolean IntelByteOrder = false;
public static final boolean LITTLE_ENDIAN = IntelByteOrder;
public static final boolean BIG_ENDIAN = SunByteOrder;
private SacConstants() {}
}
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