EFFECT OF METEOROLOGICAL FACTORS DURING RADAR MEASUREMENTS,
HOLMAN (JOHN F) CO INC WASHINGTON D C
Pagination or Media Count:
The basic source of errors in high frequency radar measurements due to meteorological factors is identification of the refraction index n sub av obtained as the average value of measurements made at the end of the line with its true value n, which is characteristic for the entire measured line at the level of radio beam transmission. The error depends first on the value of the vertical gradient of the refraction index within the layer of atmosphere where the radio waves are propagated during radio geodetic measurements. If the law is known for the variation in the refraction index with altitude and the average height of radio beam h over the base surface for example, by taking measurements from a topographical chart an attempt can be made to reduce the index of refraction measured close to the surface of the Earth to the altitude h and thereby to correct the measured radar distance. To clarify the question of variation in the refraction index with altitude, experimental data on the temperature and humidity of air at four altitudes in a layer extending to 106 m over an open, level region were processed.
- Atmospheric Physics
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation