LDI DIGISONDE 4D - Drift Measurement; Valid Schedules Suboptimal for Science Observations

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DIGISONDE-4D

SYSTEM MANUAL

VERSION 1.2.11

3-66 SECTION 3 - OPERATING INSTRUCTIONS

Drift measurement

3:125. Program design recommendations for the drift (Doppler skymap) measurements are summarized in

Table 3-10

Table 3-10. Program Design Recommendations for Drift Measurements

Recommendation

Motivation

Usage Implications

Set CIT time to 20 (day) or

40 seconds (night) by using

appropriate inter-pulse peri-

od, number of pulses per fre-

quency, and frequency multi-

plexing.

Improved Doppler resolution for a

better signal analysis and echo reso-

lution in skymaps

Higher EMI on radio systems, long-

er minimum running time. Doppler

frequency bandwidth at 40 sec CIT

may not be sufficient for polar loca-

tions.

VALID SCHEDULES SUBOPTIMAL FOR SCIENCE OBSERVATIONS

3:126. The following deficiencies of schedule designs are not reported automatically:

• No loopback CCEQ program is included,

• No BIT program is included,

• Gain evaluation program uses constant gain setting different from subsequent science programs, and

• CCEQ or Gain evaluation program use incompatible frequency range and step with subsequent science

programs.