The two element interferometer is controlled through IDL using the following suite of commands:
| IDL Procedure/Function | syntax | example | description |
|---|---|---|---|
| point2.pro | r = point2(alt=value, az=value) | r = point2(alt=50.,az=135.) | Points both dishes to the requested alt and az. Limits: [ 11° < alt < 87°, 72° < az < 315° ] The returned value is (mostly) meaningless. Further functionality for maintenance can be found in point2.pro |
| homer.pro | homer | homer | Moves both dishes to the limit switches, Resets both encoders for best pointing, Points the telescopes to the stow position (alt=90,az=180) |
| isun.pro | isun, coord1, coord2 [,/aa] | isun, ra, dec isun, alt, az, /aa | Stores the ra and dec of the sun in ra and
dec Stores the alt and az of the sun (with keyword aa) in alt and az More thorough documention can be found in isun.pro |
| imoon.pro | imoon, coord1, coord2 [,/aa] | imoon, ra, dec imoon, alt, az, /aa | Stores the ra and dec of the moon in ra and
dec Stores the alt and az of the moon (with keyword aa) in alt and az More thorough documention can be found in imoon.pro |
| ilst.pro | lst=ilst([juldate=value]) | lst = ilst(juldate=2454140.5) | Returns the decimal hours of the local sidereal time at Campbell Hall for the specified julian date (or current LST if juldate is not given). More thorough documentation can be found in ilst.pro |
| systime | time = systime([/seconds] [,/julian] [,/utc]) | time = systime(/seconds) time = systime(/julian, /utc) | Returns the number of seconds since 1 Jan 1970 Returns the julian date (corrected for UTC if the keyword is set) This is a native IDL command |
| sixty.pro | hms = sixty(value) | hms = sixty(17.345) | Converts a decimal value and returns a sexigesimal array |
| ten.pro | h_decimal = ten(array) | h_decimal = ten([1,45,12]) | Converts a sexigesimal array and returns a decimal value |
| startchart1.pro | startchart1 [,/sun] [,/moon] | startchart1, /sun | Reads voltages from the HP voltmeter, plots the voltage time stream, saves the voltage, time, and LST, and, if keywords are set, records the ra and dec of the sun and moon |
Flow chart for what functions and procedures are called by startchart1.pro.
