Open AccessVariation of surface radio-refractivity at New Delhi
Author(s) -
Divija Deshpande
Publication year - 1974
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v25i2.5208
Subject(s) - new delhi , low latitude , signal strength , microwave , meteorology , environmental science , diurnal temperature variation , atmospheric sciences , latitude , range (aeronautics) , seasonality , microwave transmission , climatology , geography , telecommunications , geodesy , geology , statistics , mathematics , materials science , computer science , archaeology , metropolitan area , composite material , wireless
Studies carried out in temperate latitudes indicate that a significant relation exists between the signal strength of microwave communication systems and the variations in surface radio refractivity (Ns). With the expansion of microwave communication and television in India, communication engineers are vitally concerned in finding the extent of Variation in Ns in the country. To this end, Ns values for four representative months have been calculated In respect of New Delhi, (Safdarjung) based on ten years monthly mean data for six synoptic hours. A comparison with corresponding Ns values at New Delhi {Palam} has also been made to bring out the Importance of proper site selection. The most significant feature of the analysis is the year round diurnal range of 20 N Units or less accompanied by a strong seasonal range of about 70 N units in surface radio-refractivity. An attempt has been made to relate these changes with climatological features and to assess their likely effect on signal strength.