# Accession Number:

## ADA089578

# Title:

## Generating Real-Time Clutter Sequences - Preliminary Fortran Version.

# Descriptive Note:

## Technical note,

# Corporate Author:

## MARK RESOURCES INC MARINA DEL REY CA

# Personal Author(s):

# Report Date:

## 1978-06-13

# Pagination or Media Count:

## 4.0

# Abstract:

Attached is a Fortran subroutine TIMESQ and a companion subroutine GAUSSPN to generate essentially a continuous clutter signal sequence where the parameters are set in real-time. For this preliminary version, three arrays, specifying the amplitude spectral functions on the sigma delta A, and delta E channels are the inputs to TIMESQ. The subroutine to generate the amplitude spectral functions from the engagement geometry is under development. Basically a table of parameter values will be stored then given the engagement geometry the desired values will be retrieved from the table, possibly with interpolation finally, the amplitude spectral functions will be generated from the parameters. Current design is based on 14 parameters for the three channels. The most time consuming computatin predicted is an exponential 4 microsec on the AP120B for each spectral sample. The portion of the FFT computation for each sample is 6.3 microsec, and the total time allowed for all operations is 27 microsec per sample. Therefore, there appears to be sufficient time available to implement this approach on the AP120B.

# Descriptors:

# Subject Categories:

- Numerical Mathematics
- Computer Programming and Software
- Cybernetics