Browse Prior Art Database

Variable Scale for Digitized Radar Data

IP.com Disclosure Number: IPCOM000076543D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

McMillan, WM: AUTHOR

Abstract

In computer processing of radar data, it is usual to accept the data in a digitized form and to store it in tables having fixed-area segments, each digit entered into the table indicating the presence of a target in the associated segment. The structure shown in the drawing allows the processor to vary the size of area allocated to each digit entry, thus permitting gross-area scanning as well as fine-detail plotting without overloading the storage capacity of smaller processors. As described, a storage register is used to receive the digitized radar echoes and logic is used to delay the start of entry of bits into the register, until the return is due from a desired range, as well as to control the speed of sampling the return so as to vary the range increment for which echoes will be stored.

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Variable Scale for Digitized Radar Data

In computer processing of radar data, it is usual to accept the data in a digitized form and to store it in tables having fixed-area segments, each digit entered into the table indicating the presence of a target in the associated segment. The structure shown in the drawing allows the processor to vary the size of area allocated to each digit entry, thus permitting gross-area scanning as well as fine-detail plotting without overloading the storage capacity of smaller processors. As described, a storage register is used to receive the digitized radar echoes and logic is used to delay the start of entry of bits into the register, until the return is due from a desired range, as well as to control the speed of sampling the return so as to vary the range increment for which echoes will be stored.

In the drawing, an oscillator 1 will drive a clock 2 starting at the transmission of a pulse from a radar unit 3. A data processor, not shown, will initially load a starting range register 4 with a value, indicating the range at which it is desired to start recording radar data echoes, and also with a rate value to indicate the range interval between the sampling times of the radar echoes. A counter 5, driven by clock 2, indicates the increasing range of the radar echoes, and its stored value is constantly compared by comparer 6 with that set in register 4. When the two values are equal, the desired range interval is being entered and...