In-orbit performance of Herschel-HIFI | Astronomy & Astrophysics (A&A)

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Table 7

Relative (percentual) calibration error budget for the HIFI Instrument.

	HIFI mixer band
Error source	1 & 2	3 & 4	5	6& 7

Sideband ratio	3–4	4–6	4	5–8
Hot load coupling¹	<1	<1	<2	<3
Cold load coupling¹	<1	<1	<2	<3
Hot load temp.	<1	<1	<1	<1
Cold load temp.	<1	<1	<1	<1
Planetary model	<5	<5	<5	<5
Beam efficiency	<5	<5	<10	<5
Pointing²	<1	<3	<4	<8
Opt. standing waves	4	4	3	3

Notes.

⁽¹⁾

The coupling error in bands 6 & 7 is likely an overestimate and may include standing wave effects.

⁽²⁾

This relative intensity error is given for an Absolute Pointing Error (APE) of 2′′ for a single point observation of a point source.

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