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

Some details of the Westerbork radio observatory:

geographic longitude:	06o 36'15"
geographic latitude:	52o 55'01"
altitude above sea level:	16 meter
diameter telescope:	14 telescopes of 25 meter diameter on 3 km baseline (in tight array mode: single dish diameter equivalent = 96 meter)
	minimum elevation: 0o

Available observing mode: single dish, local interferometry, Very Long Baseline Interferometry (VLBI).

Frequencies used currently:

Frequency band	Observing mode
250 - 460 MHz	single dish, local interferometry
322.0 - 328.6 MHz	single dish, local interferometry, VLBI
406.1 - 410.0 MHz	single dish, local interferometry
608.0 - 614.0 MHz	single dish, local interferometry, VLBI
700 - 1200 MHz	single dish, local interferometry
1200 - 1750 MHz	single dish, local interferometry
1330.0 - 1400.0 MHz	single dish, local interferometry
1400.0 - 1427.0 MHz	single dish, local interferometry, VLBI
1610.6 - 1613.8 MHz	single dish, local interferometry, VLBI
1660.0 - 1670.0 MHz	single dish, local interferometry, VLBI
1718.8 - 1722.2 MHz	single dish, local interferometry
2215 - 2375 MHz	single dish, local interferometry, VLBI
4800.0 - 4990.0 MHz	single dish, local interferometry, VLBI
4990.0 - 5000.0 MHz	single dish, local interferometry, VLBI
8150 - 8650 MHz	single dish, local interferometry, VLBI

Research programs: galactic radio astronomy (spectral line and continuum), extra-galactic radio astronomy (spectral line and continuum), VLBI, geodetic VLBI, pulsars.