%0 Journal Article
%T A Method to Obtain the Moving Speed of Uncooperative Target Based on Only Two Measurements
%A Tao Yu
%J Advances in Aerospace Science and Technology
%P 1-9
%D 2024
%I 
%R 10.4236/aast.2024.91001
%X The
existing research results show that a fixed single station must conduct three
consecutive frequency shift measurements and obtain the target</span><span style=\"font-family:Verdana;\">กฏ</span><span style=\"font-family:Verdana;\">s moving speed by
constructing two frequency difference equations.</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">This article proposes a new method that requires
only two consecutive measurements.</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">While using the azimuth measurement to obtain the
angular difference between two radial distances, it also conducts two
consecutive Doppler frequency shift measurements at the same target azimuth.</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">On the basis of this
measurement, a frequency difference equation is first constructed and solved
jointly with the Doppler frequency shift equation. By eliminating the velocity
variable and using the measured angular difference to obtain the target</span><span style=\"font-family:Verdana;\">กฏ</span><span style=\"font-family:Verdana;\">s lead angle, the target</span><span style=\"font-family:Verdana;\">กฏ</span><span style=\"font-family:Verdana;\">s velocity can be solved
by using the Doppler frequency shift equation again.</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">The new method avoids the condition that the target
must move equidistantly, which not only provides an achievable method for engineering
applications but also lays a good foundation for further exploring the use of
steady-state signals to achieve passive positioning.
%K Moving Speed
%K Non-Cooperative Target
%K Doppler Frequency Shift
%K Frequency Difference Equation
%K Azimuth
%K Steady-State Signal
%K Passive Location
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=131650