All Tables

Table 1: Fluctuations on the map after 1 precession time for $7^\circ$ pixels. Values for both synchronous and asynchronous thermal instabilities are reported (see text for details).
Table 2: Dumping factors due to the precession of the SPOrt orbit. The cases of thermal behaviour synchronous with the Sun illumination with K=1 ( $D^1_{\rm pr}$ ), K=10 ( $D^{10}_{\rm pr}$ ) and K=30 ( $D^{30}_{\rm pr}$ ) are displayed. The asynchronous case ( $D^{\rm asy}_{\rm pr}$ ) is shown as well.
Table 3: Fluctuations on the final map due to both the first $N_{\rm orbit}$ scans and the precession. The values are reported for the four cases described in Table 2 treated in the text and for two different lifetimes. All the fluctuations are in arbitrary units considering $\left \vert\Delta (Q+jU)_0\right \vert=1$ the maximum offset fluctuation in one orbit.
Table 4: Temperature and fluctuations (maximum amplitude) of the SPOrt antenna devices.
Table 5: Maximum offset fluctuation $\Delta (Q+jU)$ in one orbit (90 min) induced by the horn temperature instabilities for the SPOrt experiment. The cases of the 22 and 90 GHz channels are reported, representing the best and worst cases among the SPOrt receivers. Details about horn temperature fluctuations ( $\Delta T_{\rm ph}^{\rm h}$ ) and antenna characteristics are also listed: horn attenuation ( $A_{\rm h}$ ), OMT isolation ( |S_B1|²), polarizer differential attenuation ( $A_{\perp }-A_{\parallel }$ ), $S\!P_{\rm omt}$ and $S\!P_{\rm pol}$ coefficients, and the $H_{\rm h}$ transfer function. $S\!P_{\rm omt}$ has been estimated with the approximation $S\!P_{\rm omt} \sim 2\; A_{\rm omt}\vert S_{A1}S_{B1}^*\vert$ as described in Carretti et al. (2001). The case of a 3 K variation is also shown, that is the natural horn temperature fluctuation without active control.
Table 6: As for Table 5, but for the cryo-stage of the SPOrt radiometers. As a worst case, we assume $A_{\rm p} = 0.1$ dB and $A_{\rm omt} = 0.2$ dB the attenuations of polarizer and OMT, respectively. Anyway, the offset fluctuations are marginally dependent on their values, $S\!P_{\rm pol}$ being the dominant term.