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Analysis of the ''Range and Range Rate'' Tracking SystemThe "Range and Range Rate" (r(sub j) + r ̇(sub j)) System in its very simplest form is described. In particular, the errors in position and velocity are treated usingpessimistic values of the measured quantities r(sub j) and r ̇(sub j). Thus, a realistic evaluation of tracking qualities can be made for different orbits over certain tracking stations. The Range and Range Rate System briefly described in this report is a high precision tracking system. Knowledge of the uncertainty in position δ (sub x(sub i) is important, but knowledge of the uncertainty of the velocity vector δ (sub x(sub i) is of the utmost importance. Thus the use of coherent Doppler measurements to determine the velocity has a great advantage over any pulsed system and, in addition, permits extremely narrow frequency bands (in the order of 10 to 100 cps) to be employed, reducing the power requirements considerably. The basis for using range r(sub j) and range rate r ̇(sub j) only is the fact that r(sub j) and r ̇(sub j) can be measured to very high precision, thus furnishing r and r with low errors. The nature of these errors is discussed.
Document ID
19620000013
Document Type
Other - NASA Technical Note (TN)
Authors
F O Vonbun (Goddard Space Flight Center Greenbelt, Maryland, United States)
Date Acquired
August 1, 2013
Publication Date
February 1, 1962
Subject Category
Space Communications, Spacecraft Communications, Command and Tracking
Report/Patent Number
NASA-TN-D-1178
G-183
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Tracking system
Range and range rate tracking
Trajectory

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