Changeset 1774

Timestamp:

Sep 9, 2004, 3:05:41 PM (22 years ago)

Author:

Paul Price

Message:

Adding psTimeTable.

File:

• trunk/archive/pslib/include/psTime.h (modified) (1 diff)

trunk/archive/pslib/include/psTime.h

@@ -78 +78 @@
 psF64 psTimeDelta(const psTime *time1, const psTime *time2);
 
+// A table of UT1-UTC and polar coordinates
+typedef struct {
+    const char *filename;               // Filename of time table
+    const psF64 validFrom, validTo;     // MJDs of validity of time table
+    bool loaded;                        // Has the table been loaded?
+    psVector *mjd;                      // MJD data, type is psF64
+    psVector *dut;                      // delta UT = UT1 - UTC data
+    psVector *xp, *yp;                  // Polar motion data
+} psTimeTable;
+
+// Constructor --- don't load
+psTimeTable *psTimeTableAlloc(const char *filename, // Filename of time table
+                              psF64 validFrom,  // The time table is valid from this MJD
+                              psF64 validTo // The time table is valid to this MJD
+                              );
+
+// Load a time table, return true for success
+bool psTimeTableLoad(psTimeTable *table // Time table to load
+                     );
+
+// Interpolate on a table, return true if given MJD is within the given range
+bool psTimeTableInterpolate(const psTimeTable *table, // Table to interpolate on
+                            double *xp, // Output x_p, or NULL
+                            double *yp, // Output y_p, or NULL
+                            double *dut,// Output UT1-UTC, or NULL
+                            psF64 mjd   // MJD at which to interpolate
+                            );
+
+// Time tables
+static psArray *timeTables;
+// Time configuration
+static psMetadata *timeConfig;
+
 #endif