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Title: Rain Rate Measurements & Rain Attenuation Studies at 7 GHz Northern India
Authors: Sarkar, S K
Ravindran, V R
Ramakrishna, M
Banerjee, P K
Dutta, H N
Issue Date: Apr-1980
Publisher: NISCAIR-CSIR, India
Abstract: Rain attenuation is an important parameter to be accounted for in tropospheric propagation of frequencies above 10 GHz. But during the monsoon period even lower frequencies around 7 GHz are appreciably affected. Hence, observations on rain rate measurements have been taken and rain attenuation studied at7 GHz. Microwave amplitude measurements were made at 7 GHz over a 42-km line-of-sight path on 24-hr basis from Jan. 1975 to Dec. 1978. It is observed that for rain rates of 100 mm/hr and more, the total attenuation is of the order of 8 dB while attenuation values decreased to 4-5 dB during moderate rain (50-80mm/hr). But rain intensities having magnitudes below 20 mm/hr have no effect on signal level at 7GHz. On the basis of theoretical rain attenuation work, equivalent rain path (for Delhi-Sonepat link of 42 km) has been evaluated and found to be ~8 km.
Page(s): 47-51
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.09(2) [April 1980]

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