Committee on Radio Astronomy Frequencies

The Committee on Radio Astronomy Frequencies (CRAF) is a committee of the European Science Foundation (ESF).

Some details of the Nançay radio observatory:

geographic longitude:	02o 12'00"
geographic latitude:	47o 23'00"
altitude above sea level:	150 meter
diameter telescope 1 (Decametric array):	144 elements on 2x3500 meter2 (equivalent with single dish of 67 meter diameter)
diameter telescope 2 (Radio heliograph):	array of 19 elements (EW) and 24 elements (NS) over 3200x1250 meter baselines
diameter telescope 3 (Decimetric radio telescope):	'Kraus type' antenna: flat mirror: 200x40 meter; spherical mirror: 300x35 meter
	minimum elevation: 3.6o

Available observing mode: single dish, array mode.

Frequencies used currently:

Frequency band	Observing mode
10 - 90 MHz	decametric array
13.36 - 13.41 MHz	decametric array
25.55 - 25.67 MHz	decametric array
37.5 - 38.25 MHz	decametric array
73.0 - 74.6 MHz	decametric array
79.25 - 80.25 MHz	decametric array
150 - 450 MHz	radio heliograph
150.05 - 153 MHz	radio heliograph
322.0 - 328.6 MHz	radio heliograph
406.1 - 410.0 MHz	single dish
608.0 - 614.0 GHz	single dish
910 - 950 MHz
1330.0 - 1400.0 MHz	single dish, decimetric radio telescope
1400.0 - 1427.0 MHz	single dish, decimetric radio telescope
1610.6 - 1613.8 MHz	single dish, decimetric radio telescope
1660.0 - 1670.0 MHz	single dish, decimetric radio telescope
1718.8 - 1722.2 MHz	single dish
2655.0 - 2690.0 MHz	single dish
2690.0 - 2700.0 MHz	single dish
3200 - 3500 MHz	single dish, decimetric radio telescope
3260.0 - 3267.0 MHz	single dish, decimetric radio telescope
3332.0 - 3339.0 MHz	single dish, decimetric radio telescope
3345.8 - 3352.5 MHz	single dish, decimetric radio telescope

Research programs: extra-galactic radio astronomy (large scale structure, physics of galaxies), galactic research (pulsar timing, circumstellar envelopes), cometary research, solar and planetary radio astronomy (Sun, planets).