{
  "id": "ews-g",
  "name": "Electro-Optical/Infrared Weather System – Geostationary (EWS-G)",
  "aliases": [],
  "domain": "space",
  "country": "USA",
  "category": "Military weather satellites",
  "status": "in-service",
  "fielded": null,
  "operators": [
    "USA"
  ],
  "summary": "Former NOAA GOES satellites repositioned over the Indian Ocean for military weather coverage.",
  "specs": [
    {
      "k": "orbit_regime",
      "v": "GEO",
      "src": [
        "asf-ews-g"
      ],
      "conf": "medium"
    },
    {
      "k": "sats_count",
      "v": 2,
      "src": [
        "asf-ews-g"
      ],
      "conf": "medium",
      "note": "EWS-G1 (ex-GOES-13) and EWS-G2 (ex-GOES-15); G1 reached end of planned life February 2024"
    },
    {
      "k": "mass_kg",
      "v": 3209,
      "src": [
        "asf-ews-g"
      ],
      "conf": "medium",
      "note": "7,075 lb at launch"
    },
    {
      "k": "power_w",
      "v": 2300,
      "src": [
        "asf-ews-g"
      ],
      "conf": "medium"
    },
    {
      "k": "program",
      "v": "General Atomics full-scale EWS satellite planned for 2026",
      "src": [
        "asf-ews-g"
      ],
      "conf": "medium"
    },
    {
      "k": "on_orbit",
      "v": 3,
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Payloads with current element sets in the public catalog, active or not."
    },
    {
      "k": "active_sats",
      "v": 2,
      "src": [
        "celestrak-gp"
      ],
      "conf": "medium",
      "note": "Count in the CelesTrak active satellites list, which estimates operational status."
    },
    {
      "k": "perigee_km",
      "v": [
        35772,
        35779
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "apogee_km",
      "v": [
        35798,
        35802
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "period_min",
      "v": [
        1436.1,
        1436.2
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "inclination_deg",
      "v": [
        1.66,
        2.06
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "satellite",
  "image": null,
  "verified": null,
  "changelog": [
    {
      "date": "2026-11-08",
      "change": "Entry created from cited open sources"
    },
    {
      "date": "2026-11-08",
      "change": "Orbital elements from CelesTrak GP data (epoch about 2026-11-08): 3 catalogued, 2 active."
    }
  ],
  "satellites": [
    {
      "name": "EWS-G1 (GOES 13)",
      "norad": 29155,
      "cospar": "2006-018A",
      "perigee_km": 35952,
      "apogee_km": 36463,
      "inclination_deg": 4.9,
      "period_min": 1457.6,
      "epoch": "2026-11-08",
      "active": false,
      "owner": null,
      "launch": null
    },
    {
      "name": "EWS-G3 (GOES 14)",
      "norad": 35491,
      "cospar": "2009-033A",
      "perigee_km": 35779,
      "apogee_km": 35798,
      "inclination_deg": 2.06,
      "period_min": 1436.2,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2009-06-27"
    },
    {
      "name": "EWS-G2 (GOES 15)",
      "norad": 36411,
      "cospar": "2010-008A",
      "perigee_km": 35772,
      "apogee_km": 35802,
      "inclination_deg": 1.66,
      "period_min": 1436.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2010-03-04"
    }
  ],
  "url": "https://www.defensepedia.com/systems/ews-g.html",
  "sources": {
    "asf-ews-g": {
      "title": "Electro-Optical/Infrared Weather System-Geostationary (weapons and platforms entry)",
      "publisher": "Air & Space Forces Magazine",
      "url": "https://www.airandspaceforces.com/weapons/ews-g/",
      "published": null,
      "tier": 3,
      "checked": "2026-11-08"
    },
    "celestrak-gp": {
      "title": "NORAD GP element sets (current data)",
      "publisher": "CelesTrak (data from the U.S. Space Force 18th/19th Space Defense Squadron catalog)",
      "url": "https://celestrak.org/NORAD/elements/",
      "published": "2026-11-08",
      "tier": 1,
      "checked": "2026-11-08"
    }
  }
}