{
  "mission": "Spring 2026 KA7NSR-15 high-altitude balloon flight",
  "date": "2026-03-28",
  "program": "Phoenix College NASA ASCEND",
  "unit_policy": "Label the source and units for every metric. Do not mix APRS altitude, aligned multisensor altitude, count rate, dose-rate conversion, particulate concentration, CO2 concentration, temperature, and relative humidity.",
  "data_products": {
    "aprs_waypoints": 168,
    "aligned_multisensor_rows": 737,
    "processed_arduino_raw_pressure_rows": 10004,
    "processed_arduino_calibrated_altitude_rows": 6447,
    "geiger_samples": 165
  },
  "flight_metrics": {
    "aprs_burst_altitude_ft": 82496.995512,
    "aprs_burst_altitude_m": 25145.39,
    "aligned_multisensor_max_altitude_ft": 83661.518,
    "aprs_launch_lat": 32.87533,
    "aprs_launch_lon": -112.0495,
    "aprs_landing_lat": 33.11883,
    "aprs_landing_lon": -111.6555,
    "aprs_elapsed_seconds_final": 16468,
    "max_ascent_rate_ft_s": 36.24635940740736,
    "max_ascent_rate_mph": 24.713426868686838,
    "max_descent_rate_ft_s": -93.22641745454563,
    "max_descent_rate_mph": -63.563466446281105
  },
  "science_findings": {
    "count_rate": {
      "profile_marker_ft": 63300,
      "profile_marker_name": "Pfotzer-Regener region marker from annotated beta/gamma plot",
      "max_cpm": 524,
      "max_uSv_h": 3.406,
      "mean_cpm": 141.982
    },
    "co2": {
      "workbook_max_ppm": 957,
      "workbook_max_altitude_ft": 83661.518,
      "chart_annotation_ppm": 939,
      "chart_annotation_altitude_ft": 77483,
      "publication_note": "Homepage KPI uses workbook_max_ppm and labels it as workbook-derived. Older chart annotation is retained as a reconciliation note."
    },
    "particulate_peaks": [
      { "channel": "PM0.3", "peak_mg_m3": 17, "altitude_ft": [10095.1625] },
      { "channel": "PM0.5", "peak_mg_m3": 15, "altitude_ft": [9429.3125, 10095.1625] },
      { "channel": "PM1.0", "peak_mg_m3": 24, "altitude_ft": [6395.7925, 9429.3125] },
      { "channel": "PM2.5", "peak_mg_m3": 19, "altitude_ft": [9429.3125, 10095.1625] },
      { "channel": "PM5.0", "peak_mg_m3": 24, "altitude_ft": [9429.3125] },
      { "channel": "PM10", "peak_mg_m3": 27, "altitude_ft": [9429.3125, 10095.1625] }
    ],
    "environment": {
      "internal_temperature_min_C": -3,
      "internal_temperature_max_C": 31,
      "relative_humidity_min_percent": 12,
      "relative_humidity_max_percent": 29
    }
  },
  "site_use": "Homepage cards, Spring 2026 data narrative, engineering reviews, student recruiting, and mission documentation."
}