Miss distance indicator data processing and recording apparatus

Claim 2

A miss distance indicator data processing and recording apparatus for determining and indicating a miss distance for a missile tracking a target comprising: antenna means for receiving a radio frequency missile telemetry signal from said missile and a translated radio frequency missile telemetry signal from said target; first receiver means connected to said antenna means to receive said radio frequency missile telemetry signal, said first receiver means filtering and amplifying said radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a first predetection carrier signal; second receiver means connected to said antenna means to receive said translated radio frequency missile telemetry signal, said second receiver means filtering and amplifying said translated radio frequency missile telemetry signal and then down converting said translated radio frequency missile telemetry signal to a second predetection carrier signal; mixer means connected to said first receiver means to receive said first predetection carrier signal and said second receiver means to receive said second predetection carrier signal, said mixer means producing a difference frequency signal equal to the frequency difference between said first predetection carrier signal and said second predetection carrier signal; frequency analyzer means connected to said mixer means to receive said difference frequency signal, said frequency analyzer means processing said difference frequency signal to generate a plot of doppler frequency versus time which is used to determine the miss distance said missile misses said target in accordance with the expression: ##EQU7## where Δf is a frequency difference which said frequency analyzer means determines and then displays; Δt is a time difference which said frequency analyzer means determines and then displays and λ is constant for said radio frequency missile telemetry signal; and printer means connected to said frequency analyzer means, said printer means generating a printout of said plot of doppler frequency versus time.

Claim 3

The miss distance indicator data processing and recording apparatus of claim 1 wherein said first and second receiver means each comprise a telemetry receiver.

Claim 4

The miss distance indicator data processing and recording apparatus of claim 1 wherein said mixer means comprises a double balanced mixer.

Claim 5

The miss distance indicator data processing and recording apparatus of claim 1 wherein said radio frequency missile telemetry signal has a frequency of about 2215.5 Megahertz.

Claim 6

The miss distance indicator data processing and recording apparatus of claim 1 wherein said translated radio frequency missile telemetry signal has a frequency of about 1826 Megahertz.

Claim 7

The miss distance indicator data processing and recording apparatus of claim 1 wherein said constant λ for said radio frequency missile telemetry signal is about 0.444.

Claim 8

A miss distance indicator data processing and recording apparatus for determining and indicating a miss distance for a missile tracking a target comprising: an antenna for receiving a radio frequency missile telemetry signal from said missile and a translated radio frequency missile telemetry signal from said target; a first telemetry receiver connected to said antenna to receive said radio frequency missile telemetry signal, said first telemetry receiver filtering and amplifying said radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a first predetection carrier signal; a second telemetry receiver connected to said antenna to receive said translated radio frequency missile telemetry signal, said second telemetry receiver filtering and amplifying said translated radio frequency missile telemetry signal and then down converting said translated radio frequency missile telemetry signal to a second predetection carrier signal; a double balanced mixer connected to said first telemetry receiver to receive said first predetection carrier signal and said second telemetry receiver to receive said second predetection carrier signal, said double balanced mixer producing a difference frequency signal equal to the frequency difference between said first predetection carrier signal and said second predetection carrier signal; a frequency analyzer connected to said double balanced mixer to receive said difference frequency signal; said frequency analyzer processing said difference frequency signal to generate a plot of doppler frequency versus time which is used to determine the miss distance said missile misses said target in accordance with the expression: ##EQU8## where Δf is a frequency difference which said frequency analyzer determines and then displays; Δt is a time difference which said frequency analyzer determines and then displays and λ is constant for said radio frequency missile telemetry signal; and a printer connected to said frequency analyzer, said printer generating a printout of said plot of doppler frequency versus time.

Claim 9

A miss distance indicator data processing and recording apparatus for determining and indicating a miss distance for a missile tracking a target comprising: an antenna for receiving a radio frequency missile telemetry signal from said missile and a translated radio frequency missile telemetry signal from said target; a first telemetry receiver connected to said antenna to receive said radio frequency missile telemetry signal, said first telemetry receiver filtering and amplifying said radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a first predetection carrier signal; a second telemetry receiver connected to said antenna to receive said translated radio frequency missile telemetry signal, said second telemetry receiver filtering and amplifying said translated radio frequency missile telemetry signal and then down converting said translated radio frequency missile telemetry signal to a second predetection carrier signal; a double balanced mixer connected to said first telemetry receiver to receive said first predetection carrier signal and said second telemetry receiver to receive said second predetection carrier signal, said double balanced mixer producing a difference frequency signal equal to the frequency difference between said first predetection carrier signal and said second predetection carrier signal; a frequency analyzer connected to said double balanced mixer to receive said difference frequency signal; said frequency analyzer processing said difference frequency signal to generate a plot of doppler frequency versus time which is used to determine the miss distance said missile misses said target in accordance with the expression: ##EQU8## where Δf is a frequency difference which said frequency analyzer determines and then displays; Δt is a time difference which said frequency analyzer determines and then displays and λ is constant for said radio frequency missile telemetry signal; and a printer connected to said frequency analyzer, said printer generating a printout of said plot of doppler frequency versus time.

Claim 10

The miss distance indicator data processing and recording apparatus of claim 7 wherein said radio frequency missile telemetry signal has a frequency of about 2215.5 Megahertz.

Claim 11

The miss distance indicator data processing and recording apparatus of claim 7 wherein said translated radio frequency missile telemetry signal has a frequency of about 1826 Megahertz.

Claim 12

The miss distance indicator data processing and recording apparatus of claim 7 wherein said first predetection carrier signal has a frequency of about 900 kilohertz.

Claim 13

The miss distance indicator data processing and recording apparatus of claim 7 wherein said second predetection carrier signal has a frequency of about 924 kilohertz.

Claim 14

The miss distance indicator data processing and recording apparatus of claim 7 wherein said constant λ for said radio frequency missile telemetry signal is about 0.444.

Claim 15

A miss distance indicator data processing and recording apparatus for determining and indicating a miss distance for a missile tracking a target comprising: an antenna for receiving a radio frequency missile telemetry signal from said missile and a translated radio frequency missile telemetry signal from said target; a first telemetry receiver connected to said antenna to receive said radio frequency missile telemetry signal, said first telemetry receiver filtering and amplifying said radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a first predetection carrier signal; a second telemetry receiver connected to said antenna to receive said translated radio frequency missile telemetry signal, said second telemetry receiver filtering and amplifying said translated radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a second predetermined carrier signal; an analog magnetic tape recorder connected to said first telemetry receiver to receive said first predetection carrier signal and said second telemetry receiver to receive said second predetection carrier signal, said analog magnetic tape recorder recording said first predetection carrier signal and said second predetection carrier signal; a double balanced mixer connected to said analog magnetic tape recorder to receive said first predetection carrier signal and said second predetection carrier signal, said double balanced mixer producing a difference frequency signal equal to the frequency difference between said first predetection carrier signal and said second predetection carrier signal; a frequency analyzer connected to said double balanced mixer to receive said difference frequency signal; said frequency analyzer processing said difference frequency signal to generate a plot of doppler frequency versus time which is used to determine the miss distance said missile misses said target in accordance with the expression: ##EQU9## where Δf is a frequency difference which said frequency analyzer determines and then displays; Δt is a time difference which said frequency analyzer determines and then displays and λ is constant for said radio frequency missile telemetry signal; and a printer connected to said frequency analyzer, said printer generating a printout of said plot of doppler frequency versus time.

Claim 16

A miss distance indicator data processing and recording apparatus for determining and indicating a miss distance for a missile tracking a target comprising: an antenna for receiving a radio frequency missile telemetry signal from said missile and a translated radio frequency missile telemetry signal from said target; a first telemetry receiver connected to said antenna to receive said radio frequency missile telemetry signal, said first telemetry receiver filtering and amplifying said radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a first predetection carrier signal; a second telemetry receiver connected to said antenna to receive said translated radio frequency missile telemetry signal, said second telemetry receiver filtering and amplifying said translated radio frequency missile telemetry signal and then down converting said radio frequency missile telemetry signal to a second predetermined carrier signal; an analog magnetic tape recorder connected to said first telemetry receiver to receive said first predetection carrier signal and said second telemetry receiver to receive said second predetection carrier signal, said analog magnetic tape recorder recording said first predetection carrier signal and said second predetection carrier signal; a double balanced mixer connected to said analog magnetic tape recorder to receive said first predetection carrier signal and said second predetection carrier signal, said double balanced mixer producing a difference frequency signal equal to the frequency difference between said first predetection carrier signal and said second predetection carrier signal; a frequency analyzer connected to said double balanced mixer to receive said difference frequency signal; said frequency analyzer processing said difference frequency signal to generate a plot of doppler frequency versus time which is used to determine the miss distance said missile misses said target in accordance with the expression: ##EQU9## where Δf is a frequency difference which said frequency analyzer determines and then displays; Δt is a time difference which said frequency analyzer determines and then displays and λ is constant for said radio frequency missile telemetry signal; and a printer connected to said frequency analyzer, said printer generating a printout of said plot of doppler frequency versus time.

Claim 17

The miss distance indicator data processing and recording apparatus of claim 13 wherein said radio frequency missile telemetry signal has a frequency of about 2215.5 Megahertz.

Claim 18

The miss distance indicator data processing and recording apparatus of claim 13 wherein said radio frequency target telemetry signal has a frequency of about 1826 Megahertz.

Claim 19

The miss distance indicator data processing and recording apparatus of claim 13 wherein said first intermediate frequency signal has a frequency of about 900 kilohertz.

Claim 20

The miss distance indicator data processing and recording apparatus of claim 13 wherein said second intermediate frequency signal has a frequency of about 924 kilohertz.

Claim 21

The miss distance indicator data processing and recording apparatus of claim 13 wherein said constant λ for said radio frequency missile telemetry signal is about 0.444.

Claim 22

The miss distance indicator data processing and recording apparatus of claim 13 further comprising a time code generator connected to said analog magnetic tape recorder, said time code generator receiving externally generated position data, said time code generator extracting time data from said position data, said time code generator providing said time data to said analog magnetic tape recorder, said time code generator having a position data receiving antenna connected thereto.