Zodiacal light

Dohnanyi JS (1976) Sources of interplanetary dust Asteroids. In Interplanetary dust and zodiacal light 48 187-206. H Elsasser, H Fechtig (eds) Springer-Verlag, Berhn Doney SC, Jenkins JW (1994) Ventilation of the deep western boundary current and abyssal western North Atlantic - Estimates from tritium and He-3 distributions. J Phys Oceanogr 24 638-659 Dreisigacker E, Roether W (1978) Tritium and Sr in north Atlantic surface water. Earth Planet Sci Lett 38 301-312... 

Figure 6. Zodiacal light observations a) Geometry of the observations b) Zodiacal polarization, as seen from the Earth. The outer circle corresponds to the ecliptic and the upper line to the Sun-anti-Sun line, with ecliptic pole at the center (from [41]).

At the Detector Noise Moduie, the Noise Equivalent Power (NEP) associated to the detectors and the 1 // noise are calculated. In parallel, with the physical properties of the system defined, the Background Power Module calculates the background power noise due to the instmment and the Cosmic Microwave Background (CMB), Cosmic Infrared Background (CIB) and Zodiacal Light. 

The simulator also takes into account the emission from the Cosmic Microwave Background (CMB), the Cosmic Infrared Background (CIB) and Zodiacal light (Zodi), at the respective temperatures Tcmb, Tcib and Tzoi,-. From internal communication, the emlssivites for these three components are... 

Gegenschein (German counterglow) A faint elliptical patch of light visible on a moonless night on the ecliptic at a point 180° from the position of the sun. It is caused by the reflection of sunlight by meteoric particles (see also zodiacal light). 

As a result of this extreme cold, we espect the sky over the South Pole to be exquisitely dark in this restricted range of wavelengths. Compared to a good mid-latitude site, we ve calculated that the thermal background from the telescope and atmosphere will be lower by a factor of over 700 - at or near the limit set by the zodiacal light. If this is true, then a telescope at the South Pole can do qtdte well compared with a telescope situated at any of the usual sites a 60 cm telescope can compete effectively with a 4 m telescope ... 

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