{
  "id": "pwsa",
  "name": "Proliferated Warfighter Space Architecture (PWSA)",
  "aliases": [
    "SDA Tranche",
    "Transport Layer",
    "Tracking Layer",
    "PWSA"
  ],
  "domain": "space",
  "country": "USA",
  "category": "Military LEO data transport and missile tracking constellation",
  "status": "in-development",
  "fielded": null,
  "operators": [
    "USA"
  ],
  "summary": "Space Development Agency constellation of small LEO satellites for data transport (Link 16-capable) and missile tracking.",
  "specs": [
    {
      "k": "orbit_regime",
      "v": "LEO",
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium"
    },
    {
      "k": "first_launch",
      "v": 2023,
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium"
    },
    {
      "k": "mass_kg",
      "v": 227,
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium",
      "note": "About 500 lb"
    },
    {
      "k": "sats_count",
      "v": 27,
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium",
      "note": "Tranche 0: 19 transport and 8 tracking (demonstration)"
    },
    {
      "k": "sats_planned",
      "v": 154,
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium",
      "note": "Tranche 1: 126 transport and 28 tracking"
    },
    {
      "k": "contractor",
      "v": "York, Lockheed Martin, SpaceX, L3Harris, Northrop Grumman (Tranche 2)",
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium"
    },
    {
      "k": "program",
      "v": "First 42 Tranche 1 transport satellites launched Sept–Oct 2025; launches resumed July 2026 after a nine-month pause; 36 Golden Dome tracking satellites awarded July 2026",
      "src": [
        "asf-pwsa"
      ],
      "conf": "medium"
    },
    {
      "k": "on_orbit",
      "v": 63,
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Payloads with current element sets in the public catalog, active or not. Objects named PRAETORIAN SDA_ (L3Harris/Lockheed Tranche 1 tracking and transport) and SDA-NG-T1TL (Northrop Grumman Tranche 1 transport)."
    },
    {
      "k": "active_sats",
      "v": 63,
      "src": [
        "celestrak-gp"
      ],
      "conf": "medium",
      "note": "Count in the CelesTrak active satellites list, which estimates operational status."
    },
    {
      "k": "perigee_km",
      "v": [
        930,
        950
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "apogee_km",
      "v": [
        948,
        959
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "period_min",
      "v": [
        103.9,
        104.1
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    },
    {
      "k": "inclination_deg",
      "v": [
        81.3,
        81.5
      ],
      "src": [
        "celestrak-gp"
      ],
      "conf": "high",
      "note": "Active satellites per CelesTrak, element epoch about 2026-11-08."
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "satellite",
  "image": {
    "file": "pwsa.jpg",
    "thumb": "pwsa-thumb.jpg",
    "credit": "Airman 1st Class Spencer Contreras, U.S. Space Force / DVIDS",
    "license": "Public domain",
    "url": "https://www.dvidshub.net/image/8240635",
    "title": "USSF-124 lifts off",
    "source": "DVIDS",
    "dvids_id": 8240635,
    "unit": "Space Launch Delta 45"
  },
  "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): 63 catalogued, 63 active."
    }
  ],
  "satellites": [
    {
      "name": "PRAETORIAN SDA_602",
      "norad": 65565,
      "cospar": "2025-203A",
      "perigee_km": 946,
      "apogee_km": 955,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_603",
      "norad": 65566,
      "cospar": "2025-203B",
      "perigee_km": 943,
      "apogee_km": 957,
      "inclination_deg": 81.3,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_604",
      "norad": 65567,
      "cospar": "2025-203C",
      "perigee_km": 949,
      "apogee_km": 957,
      "inclination_deg": 81.31,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_605",
      "norad": 65568,
      "cospar": "2025-203D",
      "perigee_km": 947,
      "apogee_km": 959,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_606",
      "norad": 65569,
      "cospar": "2025-203E",
      "perigee_km": 948,
      "apogee_km": 957,
      "inclination_deg": 81.31,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_607",
      "norad": 65570,
      "cospar": "2025-203F",
      "perigee_km": 944,
      "apogee_km": 957,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_608",
      "norad": 65571,
      "cospar": "2025-203G",
      "perigee_km": 946,
      "apogee_km": 955,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_609",
      "norad": 65572,
      "cospar": "2025-203H",
      "perigee_km": 944,
      "apogee_km": 954,
      "inclination_deg": 81.31,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_610",
      "norad": 65573,
      "cospar": "2025-203J",
      "perigee_km": 946,
      "apogee_km": 956,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_611",
      "norad": 65574,
      "cospar": "2025-203K",
      "perigee_km": 948,
      "apogee_km": 956,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_612",
      "norad": 65575,
      "cospar": "2025-203L",
      "perigee_km": 939,
      "apogee_km": 953,
      "inclination_deg": 81.3,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_613",
      "norad": 65576,
      "cospar": "2025-203M",
      "perigee_km": 950,
      "apogee_km": 958,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_614",
      "norad": 65577,
      "cospar": "2025-203N",
      "perigee_km": 942,
      "apogee_km": 952,
      "inclination_deg": 81.3,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_615",
      "norad": 65578,
      "cospar": "2025-203P",
      "perigee_km": 941,
      "apogee_km": 955,
      "inclination_deg": 81.3,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_616",
      "norad": 65579,
      "cospar": "2025-203Q",
      "perigee_km": 948,
      "apogee_km": 956,
      "inclination_deg": 81.31,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_617",
      "norad": 65580,
      "cospar": "2025-203R",
      "perigee_km": 947,
      "apogee_km": 958,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_618",
      "norad": 65581,
      "cospar": "2025-203S",
      "perigee_km": 942,
      "apogee_km": 956,
      "inclination_deg": 81.3,
      "period_min": 104,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_619",
      "norad": 65582,
      "cospar": "2025-203T",
      "perigee_km": 945,
      "apogee_km": 957,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_620",
      "norad": 65583,
      "cospar": "2025-203U",
      "perigee_km": 947,
      "apogee_km": 958,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_621",
      "norad": 65584,
      "cospar": "2025-203V",
      "perigee_km": 945,
      "apogee_km": 956,
      "inclination_deg": 81.3,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_601",
      "norad": 65585,
      "cospar": "2025-203W",
      "perigee_km": 949,
      "apogee_km": 957,
      "inclination_deg": 81.31,
      "period_min": 104.1,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2025-09-10"
    },
    {
      "name": "PRAETORIAN SDA_501",
      "norad": 100059,
      "cospar": "2026-163A",
      "perigee_km": 936,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_502",
      "norad": 100060,
      "cospar": "2026-163B",
      "perigee_km": 934,
      "apogee_km": 953,
      "inclination_deg": 81.49,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_503",
      "norad": 100061,
      "cospar": "2026-163C",
      "perigee_km": 932,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_504",
      "norad": 100062,
      "cospar": "2026-163D",
      "perigee_km": 936,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_505",
      "norad": 100063,
      "cospar": "2026-163E",
      "perigee_km": 933,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_506",
      "norad": 100064,
      "cospar": "2026-163F",
      "perigee_km": 931,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_507",
      "norad": 100065,
      "cospar": "2026-163G",
      "perigee_km": 936,
      "apogee_km": 954,
      "inclination_deg": 81.49,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_508",
      "norad": 100066,
      "cospar": "2026-163H",
      "perigee_km": 935,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_509",
      "norad": 100067,
      "cospar": "2026-163J",
      "perigee_km": 935,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_510",
      "norad": 100068,
      "cospar": "2026-163K",
      "perigee_km": 936,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_511",
      "norad": 100069,
      "cospar": "2026-163L",
      "perigee_km": 934,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_512",
      "norad": 100070,
      "cospar": "2026-163M",
      "perigee_km": 933,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_513",
      "norad": 100071,
      "cospar": "2026-163N",
      "perigee_km": 936,
      "apogee_km": 954,
      "inclination_deg": 81.49,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_514",
      "norad": 100072,
      "cospar": "2026-163P",
      "perigee_km": 937,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_515",
      "norad": 100073,
      "cospar": "2026-163Q",
      "perigee_km": 932,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_516",
      "norad": 100074,
      "cospar": "2026-163R",
      "perigee_km": 930,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_517",
      "norad": 100075,
      "cospar": "2026-163S",
      "perigee_km": 931,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_518",
      "norad": 100076,
      "cospar": "2026-163T",
      "perigee_km": 931,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_519",
      "norad": 100077,
      "cospar": "2026-163U",
      "perigee_km": 935,
      "apogee_km": 953,
      "inclination_deg": 81.49,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_520",
      "norad": 100078,
      "cospar": "2026-163V",
      "perigee_km": 931,
      "apogee_km": 953,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "PRAETORIAN SDA_521",
      "norad": 100079,
      "cospar": "2026-163W",
      "perigee_km": 932,
      "apogee_km": 954,
      "inclination_deg": 81.48,
      "period_min": 103.9,
      "epoch": "2026-11-07",
      "active": true,
      "owner": "US",
      "launch": "2026-07-16"
    },
    {
      "name": "SDA-NG-T1TL-401",
      "norad": 100983,
      "cospar": "2026-231A",
      "perigee_km": 938,
      "apogee_km": 952,
      "inclination_deg": 81.5,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-10-10"
    },
    {
      "name": "SDA-NG-T1TL-402",
      "norad": 100984,
      "cospar": "2026-231B",
      "perigee_km": 938,
      "apogee_km": 952,
      "inclination_deg": 81.5,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
      "launch": "2026-10-10"
    },
    {
      "name": "SDA-NG-T1TL-403",
      "norad": 100985,
      "cospar": "2026-231C",
      "perigee_km": 938,
      "apogee_km": 952,
      "inclination_deg": 81.5,
      "period_min": 103.9,
      "epoch": "2026-11-08",
      "active": true,
      "owner": "US",
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  "url": "https://www.defensepedia.com/systems/pwsa.html",
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      "title": "Proliferated Warfighter Space Architecture (weapons and platforms entry)",
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}