Space Conjunction Data Service

    A global standardized CDM data service platform for space conjunction detection, risk analytics

    Conjunction data in this service is generated through a preliminary screening process based on SGP4 (Simplified General Perturbations Model 4) orbit propagation. Space object ephemerides are propagated using publicly available orbital elements to identify potential close-approach events and produce candidate Conjunction Data Messages (CDMs).
    This dataset is provided as a rapid screening product for preliminary conjunction assessment, supporting early detection and prioritization of potential close-approach events. It serves as upstream input for high-precision orbit determination (OD), covariance analysis, and refined collision probability (Pc) evaluation.
    Data Production Rules
    Minimum Miss Distance ≤ 3 km, latest approach time ≤ 72 hours
    Today Events
    0
    Period: 09-25 00:00 ~ 09-25 23:59
    Month Events
    0
    Period: 09-01 ~ 09-30
    Next 3 Days Events
    0
    Period: 09-25 00:00 ~ Day 3 23:59
    High Risk Events
    0
    Today 610
    Tomorrow 2047
    Day after 1012
    Extreme(>10⁻³) + High(10⁻³~10⁻⁴)
    Monitored Objects
    0
    Total monitored space objects

    Collision Level Distribution (Next 3 Days)

    Data Update Time:2026-09-25T16:00:00Z
    Extreme Risk 165 0.3%
    High Risk 999+ 5.6%
    Medium Risk 999+ 15.2%
    Low Risk 999+ 65.5%
    Very Low Risk 999+ 13.5%
    Collision Probability Levels (1-5)

    Upcoming Collision Events (Next 3 Days)

    Data Update Time:2026-09-25T16:00:00Z
    2026-09-26T05:20:20+0000 极高风险: 1.74966E-3
    2026-09-26T23:40:41+0000 极高风险: 1.734851E-3
    2026-09-26T23:50:47+0000 极高风险: 1.708238E-3
    View All Events

    Miss Distance Level Distribution (Next 3 Days)

    Data Update Time:2026-09-25T16:00:00Z
    Extremely Close Range 8 0.0%
    Close Range 116 0.2%
    Medium Range 999+ 1.6%
    Long Range 999+ 15.1%
    Extremely Long Range 999+ 83.1%
    Miss Distance Levels (1-5)

    Upcoming Miss Distance Events (Next 3 Days)

    Data Update Time:2026-09-25T16:00:00Z
    2026-09-26T05:20:20+0000 极近距离: 0.004km
    2026-09-26T23:40:41+0000 极近距离: 0.007km
    2026-09-26T23:50:47+0000 极近距离: 0.007km
    View All Events

    Conjunction Heatmap - Today

    Data Update Time:2026-09-25T16:00:00Z
    Event count distribution by altitude layer × date
    Conjunction Heatmap - Today

    Recent Conjunction Events

    Event ID Objects TCA
    Miss Distance
    Dist Level
    Collision Risk Probability (CRP)
    Risk Level
    Collision Risk Index (CRI) Rel. Velocity Action
    CDM_260925-000003-054105-795722
    2026-09-25T
    00:00:06+0000
    0.584 km
    远距离
    1.330099E-4 高风险
    0.77 13.468km/s
    CDM_260925-000005-466305-496723
    2026-09-25T
    00:00:51+0000
    1.37 km
    极远距离
    7.244548E-6 低风险
    0.52 10.645km/s
    CDM_260925-000106-694406-999421
    2026-09-25T
    00:01:14+0000
    2.921 km
    极远距离
    9.260601E-7 极低风险
    0.34 7.277km/s
    CDM_260925-000106-610806-952121
    2026-09-25T
    00:01:26+0000
    1.616 km
    极远距离
    2.526671E-6 低风险
    0.43 4.808km/s
    CDM_260925-000106-581006-838821
    2026-09-25T
    00:01:28+0000
    2.018 km
    极远距离
    2.098013E-6 低风险
    0.41 9.348km/s
    CDM_260925-000106-442306-643121
    2026-09-25T
    00:01:30+0000
    2.579 km
    极远距离
    1.086004E-6 低风险
    0.36 7.11km/s
    CDM_260925-000104-298805-247621
    2026-09-25T
    00:01:32+0000
    0.138 km
    中距离
    1.037672E-3 极高风险
    0.95 14.771km/s
    CDM_260925-000105-283406-759421
    2026-09-25T
    00:01:49+0000
    2.686 km
    极远距离
    1.462069E-6 低风险
    0.38 13.283km/s
    CDM_260925-000106-323906-349821
    2026-09-25T
    00:01:51+0000
    2.274 km
    极远距离
    2.005755E-6 低风险
    0.41 13.574km/s
    CDM_260925-000205-408906-772921
    2026-09-25T
    00:02:08+0000
    2.763 km
    极远距离
    1.481478E-6 低风险
    0.38 14.615km/s
    View All Events

    Space Object Flight Safety Monitoring Process

    ② Space Conjunction Data Service Conjunction params, risk calculation & assessment (Space Conjunction Data Service)
    ↑
    ① AOE Orbital Elements ADS Orbital Elements
    Daily Monitoring
    ③ High-Risk Check (High-Risk Check)
    →
    ④ TianShu Collision Warning Service Observation tracking, orbit det., collision calc. (TianShu Collision Warning Service)
    Loop
    ⑥ TianShu Safety Check Orbit extrapolation, risk assessment, continuous monitoring (TianShu Safety Check)
    ←
    ⑤ Collision Warning Report Plan iteration, safety check, avoidance advice (Collision Warning Report)
    ↓
    High-Risk Monitoring

    Event Alert Subscription

    Receive instant alerts for conjunctions of your tracked objects

    Submission coming soon. Please contact our sales for activation.

    Premium Service VIP Only

    High-precision CDM push, customized filters, dedicated support

    High-precision Orbit Determination (OD) reports
    Real-time CDM push to email or API endpoints
    Custom probability thresholds and alert rules
    7×24 dedicated technical support team
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