230 GHz	345 GHz	492 GHz	810 GHz
Beff
Jupiter FWHM			65.5"x76.9"	51"x39.9"
HPBW			55"	37"

Last update: 15.06.2004

KOSMA beam efficiencies and half power beamwidths between 220 and 810 GHz after photogrametric measurement

	230 GHz	345 GHz	492 GHz	810 GHz
Beff			62%	50%
FWHM			60"x90"	44"

Comparison of W3 IRS5 CO_7-6 line in Wintersession 2001/2002 to 2002/2003.
Beam maps of SMART:19.12.2002, 18.01.2003 and 19.01.2003.
The forward efficiency Feff is about 90%. T_mb = F_eff/B_eff T_A*.
Last update: 12.03.2003

Current KOSMA beam efficiencies and half power beamwidths between 220 and 810 GHz (As of 2002)

	230 GHz	345 GHz	460 GHz	492 GHz	660 GHz	810 GHz
Beff	68%	70%	55%	50%	40%	20%
HPBW	130''	82''	57''	56''	45''x60''	42''

The forward efficiency Feff is about 90%. T_mb = F_eff/B_eff T_A*.
Continuum scans of the sun edge at 810 GHz indicate an errorbeam of FWHM which is about 3.5 larger than the HPBW and contains about 2-3 times more power than the main beam. The size of the errorbeam does thus rougly correspond to the size of individual panels of the 3m dish. (CKr)
Last update: 16/1/2002

Efficiencies bei 345/690 GHz im Winter 99/00
(Jupitermessungen vom 20.Dezember 1999, Jan Wouterloot)

	345 GHz	661 GHz
z-Fokus ( Fokuskurven )	-3150 micron	-3350 micron
Feff	92%	92%
Meff (2) ( Mondscans )	80%	80%
Beff	68% bei z=-3100	42% bei z=-3100 (auch: z=-3250, M.Miller)
HPBW	82"  (theor.: 73")	45"x60"  (theor.:36")
Alignment	0/0	-8"/-5"
Beammaps	Jupiterkarte bei 345 GHz	Jupiterkarte bei 661 GHz

Jupitermessungen vom 22.November 1999, M.Miller & B. Deiss

	345 GHz	266 GHz
z-Fokus	-3300 micron	-4000 micron
Feff	ca. 90%	ca. 90%
Meff (2)	---	---
Beff	65%	65%
HPBW	85"  (theor.: 73")	124"x108"  (theor.:94")
Alignment	0/0	10"/18" ??
Beammaps	---	---

Feff : Forward Efficiency aus Skydips, Meff: Mond Efficiency, Beff: Beam Efficiency, HPBW: Halbwertsbreite der Teleskopkeule, theor.: theoretische HPBW nach Goldsmith für einen Edge Taper von -14dB.

Efficiencies bei 230/345 GHz im Sommer 1999
Jupitermessungen vom 27.September 1999, M.Miller

	345 GHz	230 GHz
z-Fokus	-3130 micron	-3550 micron
Feff	ca. 90%	ca. 90%
Meff (2)	78% ??	73% ??
Beff	64%	69%
HPBW	81"  (theor.: 73")	104"x116"  (theor.:94")
Alignment	0/0	18"/19" ??
Beammaps	---	---

Problem im Sommer 99 (8-11/99): Die Anschläge des Tertiärspiegels waren nicht stabil. Neujustage des Anschlags Port R in der Woche 1.-8.11.99. Neujustage beider Anschläge in der Woche 22.-29.11.99.

(2) Antennentemperaturen vom Mond bei 345/661 GHz: 275K/279K 13 Tage nach Neumond gemessen.