LDI DIGISONDE 4D - Chapter 3 _ Digisonde-4 D Programming Recommendations; Quality Control of Progsched Definitions; Valid Programs Unsuitable for Science Observations

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DIGISONDE-4D
SYSTEM MANUAL
VERSION 1.2.11
3-64 SECTION 3 - OPERATING INSTRUCTIONS
CHAPTER 3
DIGISONDE-4D PROGRAMMING RECOMMENDATIONS
QUALITY CONTROL OF PROGSCHED DEFINITIONS
3:119. DCART editors have a comprehensive built-in system of quality control that makes it difficult to pro-
gram Digisonde-4D measurements erroneously. If a program or schedule design violates any of the included
quality checks, the editor places a red-colored “Show Design Error” button on the top panel of the editor and
generates a warning window if the operator navigates away from the definition that raised the error flag. Press-
ing the “Show Design Error” button opens a report window with explanation of the error condition.
3:120. Typical classes of errors that DCART editors identify automatically to raise the error flag are:
• PROGRAM SETTINGS INCOMPATIBLE WITH OUTPUT DATA FORMAT
o use of RSF/SBF ionogram format with frequency stepping other than linear,
o use of DFT drift format with N above 128.
• INCOMPATIBLE SETTINGS WITHIN ONE PROGRAM
o sampling beyond the boundary of next repetition period,
o incorrect placement of fine steps within the coarse step,
o use of directional analysis when antenna array is incomplete.
• SCHEDULES WITH OVERLAPPING PROGRAMS
• MISSING GAIN EVALUATION
o all programs in the schedule use autogain table, but no program evaluates it
VALID PROGRAMS UNSUITABLE FOR SCIENCE OBSERVATIONS
3:121. There are several kinds of valid measurement programs that do not result in valid science data:
• Programs with 0 km start range
• Programs with “loopback” option instead of “measurement”
• Programs with “HW pattern” or “SW pattern” option instead of “measurement”
• Programs with “Save Product File” option disabled
VALID PROGRAMS WITH POTENTIAL PROBLEMS
3:122. Measurement programs that capture raw data stream in output files (program option “Save raw file” or
top level option “Save all raw data”) have potential implication of overfilling the hard disk of DATA platform.
3:123. “Radio Silent” option may not be intended for ionogram measurement, unless it is oblique sounding
experiment.