BICEP and Keck Array
Keck Array
Table:
The main properties of the BICEP instruments

Instrument
Start
End
Frequency
Resolution
Sensors (pixels)
Refs

BICEP
2006
2008
100 GHz
0.93°
50 (25)
[5][6]

150 GHz
0.60°
48 (24)
[5]

BICEP2
2010
2012
150 GHz
0.52°
500 (250)
[15]

Keck Array
2011
2011
150 GHz
0.52°
1488 (744)
[7][27]

2012
2012
2480 (1240)

2013
2018
1488 (744)
[27]

95 GHz
0.7°
992 (496)

BICEP3
2015
—
95 GHz
0.35°
2560 (1280)
[28]

Considering the table information on 'BICEP and Keck Array' (see 'Keck Array'), create one factual sentence about the highlighted cells, without adding extra data and format it within the following JSON object {"answer": "YOUR ANSWER"}.