Technical Specifications of the X-Band Interferometer

Coordinates

• Longitude = -122.2573° (East) = -122° 15' 26"
• Latitude = +37.8732° = +37° 52' 24"
• Pacific Standard Time = Universal Time + 8 hours

Baseline

• 9.05 m

Dish Diameter

• 0.9 m

Frequency Range

• 8.7 - 12.7 GHz with a 10 MHz bandwidth

Horizon limits

• Plot of the obstructed views of the dishes
• IDL save files of the obstructions for the east dish and west dish

Alt-Az

• Each dish is attached to an altitude-azimuth (alt-az) mount.
• The Home Position is (alt=90°, and az=180°) (zenith, south).
• East is az=90°.

Pointing Limits

There are some limits on where the telescope can point, summarized in the table below. Furthermore, the telescope cannot arbitrarily go to any position from any other position, the forward or reverse keyword may have to be applied. Also, the telescope may move the dishes to azimuths greater than 90° if this causes less motion on the dish. Pay attention for supplimentary angles on the report of the dish positions.

	Altitude	Azimuth
Forward	11° < 87°	52° < 316°
Reverse	11° < 87°	51° < 315°

Pointing Corrections

2007 Pointing Corrections (point.config2):

	West (degrees)	East (degrees)
alt dial constant	-0.58	-0.88
az dial constant	-2.9	+3.2

2006 Pointing Corrections (point.config2):

	West (degrees)	East (degrees)
alt dial constant	-0.5	-0.6
az dial constant	-3.0	+3.3