FRIDA INSTRUMENT CALIBRATION REPORT
Quarter: Q2 2022 (April 1 – June 30, 2022)
Classification: UNCLASSIFIED // FOR OFFICIAL USE ONLY
Prepared by: Measurement & Calibration Division, NRL
Report ID: NRL-CAL-2022-Q2-FRIDA
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1. EXECUTIVE SUMMARY
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Quarterly calibration of 15 FRIDA sensor units across 6 monitoring
stations was completed on schedule. 13 of 15 sensors passed all
tolerance checks. Sensor FRIDA-006 reported elevated noise floor
(WARNING) and sensor FRIDA-013 failed gain calibration and has been
scheduled for field replacement in Q3 2022.

2. CALIBRATION METHODOLOGY
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All sensors were calibrated against NIST-traceable reference standards
per DoD MIL-STD-45662A. Calibration was performed by certified
personnel with appropriate security clearances.

3. RESULTS SUMMARY
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  Total Sensors Calibrated:  15
  PASS:                       13
  WARNING:                     1  (FRIDA-006 — monitor for drift)
  FAIL:                        1  (FRIDA-013 — replace by Q3 2022)

4. ANOMALIES
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  FRIDA-013 at NRL-SOUT-01 recorded gain_factor of -0.0019, exceeding
  the acceptable threshold of ±0.0015. Unit flagged for replacement.
  Temporary sensor NRL-SOUT-01-TEMP installed as replacement pending
  procurement of new unit.

5. NEXT CALIBRATION
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  Scheduled: Q3 2022 (July 1 – September 30, 2022)
  Lead Technician: TBD (R.Okonkwo on leave July–August)

6. APPROVAL
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  Reviewed:  J.Torres, Senior Calibration Engineer
  Approved:  [REDACTED], Division Chief, Measurement Division NRL
  Date:      2022-07-05