Abstract
Noise measurements in the frequency regions 5–200 Hz and 5.2 × 10−4−8.3 × 10−3 Hz have been performed in the wavelength region between 300 and 3000 µm from the high altitude observatory of Testa Grigia, Italy (3.500 m). In the high frequency region a specially designed Ge bolometer operating in background-limited-infrared-photoconductor conditions matched to a 1.5-m telescope has been used, while at low frequency a radiometer designed for atmospheric transmittance measurements was employed. In both regions no excess noise with respect to the photon noise relative to 300-K blackbody has been detected.
Lingua originale | Inglese |
---|---|
pagine (da-a) | 1036-1041 |
Numero di pagine | 6 |
Rivista | IEEE Transactions on Microwave Theory and Techniques |
Volume | 22 |
Numero di pubblicazione | 12 |
DOI | |
Stato di pubblicazione | Pubblicato - dic 1974 |
Pubblicato esternamente | Sì |