SPEAR Operations


Operational Information

When complete this area will contain information of interest to radar engineers and operators.

SPEAR location

Longitude 78° 09' 15" N - Latitude 16° 03' 17" E - Altitude 458m (WGS84)
Decimal values: Logitude 78.154° N - Latitude 16.055° E - Altitude 458m (WGS84)

SPEAR array orientation

Array north direction (perpendicular to the long dimension) is 14 degrees west of magnetic north.

Declination at the site is approx 4 degrees east (2004 epoch). Angle between array north and true north is 10 degrees.

Inclination is 82 degrees (2004 epoch) i.e. 8 degrees off zenith.

Field aligned pointing direction
Co-ordinate system
Array north
Geographic
Geomagnetic
Azimuth
194 degrees
184 degrees
180 degrees
Off zenith angle
8 degrees
8 degrees
8 degrees

Note that this assumes that the slope of the array has been compensated for in the beam forming calculations in the radar control software. For information the array slope is approx 4.7 degrees (down to the North) in the short dimension and 1.0 degrees in the longer dimension (down being to the East).

SPEAR Operating Frequencies:
Frequency (MHz)
Mode
Bandwidth (Hz)
4.450
CW only
150
4.600
CW and pulse
1500
4.875
CW and pulse
1500
4.900
CW only
150
4.925
CW only
150
5.200
CW and pulse
1500
5.250
CW only
150
5.300
CW only
150
5.775
CW only
150
5.800
CW and pulse
1500
5.820
CW only
150

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