**Table 3:** Telescope and receiver tuning characteristics.
Receiver	Frequency	$\theta_B$ ¹	$\eta_{mB}$ ²	G_i ³
	[GHz]	[ $^{\prime \prime }$ ]
495 A2	487.3	146	$0.92\pm0.02$	$\approx$ 0.03
549 A1	557	127	$0.84\pm0.03$	0.04
	555-556	128	$0.84\pm0.03$	0.06
	558.3	127	$0.83\pm0.03^4$	0.06
	547.7	130	$0.85\pm0.03$	<0.03
555 B2	557	127	$0.87\pm0.03$	<0.02
	555-556	128	$0.87\pm0.03$	0.08
	558-559	127	$0.87\pm0.03$	0.06
572 B1	576.2	124	0.85	<0.06

¹ Main beam FWHM.
² Main beam efficiency value estimated from previous Jupiter maps.
³ Image band gain estimated from telluric lines observed in image bands during Earth limb crossing/calibration.
⁴ The 558 GHz tuning (554 GHz LO frequency) is at the edge of the total bandwidth (17 GHz centred at 549 GHz) of the receiver and its performance is slightly degraded.

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations
	3 Data reduction
	4 Modelling of Martian atmospheric lines and results
	5 Discussion and conclusions
	References