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18th Space Control Squadron

JFCC SPACEIntroduction for

New Operators

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Overview

• SSA Sharing Program & Services• Space-Track.org• Conjunction Assessment Process, Products & Notifications• How To:

– Name Ephemeris Files – Submit Ephemeris Files– Request Special Screening– Submit Maneuver Notifications– Inquire about tasking– Submit an ODR

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SSA Sharing Program Execution

• The USSTRATCOM SSA Sharing Program promotes the responsible use of space, advances spaceflight safety, and enhances SSA through the exchange of SSA information with the global space community

• Diverse customer base• What we can do:

– Provide high accuracy dataservices and support at no cost

– Facilitate communication & cooperation

• What we can’t do:– Recommend courses of action– Tell an operator what to do

Advanced

Emergency

Basic

USSTRATCOM SSA Sharing Agreement

Space-Track.org

Satellite Operators

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Satellite Lifetime Support

Early Engagement

Launch COLA Launch Support Early Orbit CA

On-Orbit CA & COLA

End-of-Life /Disposal

Deorbit Reentry

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Space-Track.org

• Operator Panel– Satellite operators with active spacecraft only– CDMs database with 100-day archive– Manage/share contact information, satellite status– View Maneuvers

• Files Panel– Space-Track users with approved permissions to specific folders– Maneuver upload– Ephemeris upload/download– Special-request data exchange and results (e.g. early orbit CA)

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Conjunction Assessment Messages

Conjunction Data Messages (CDM)

• Conjunction data• Provided for all events within CDM

criteria• CCSDS standard• Posted to Space-Track.org• Thousands per day

Close Approach Notification (CAN)

• Conjunction warning• Provided for all events that the 18

SPCS consider an emergency• 18 SPCS-specific message• Emailed to satellite operator• 8-15 events per day

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Conjunction Assessment Process

REFINE

Auto Update

DCs/ PropInitial SP

Screening

ID conjcandidates

Update DCs/Prop

Refinement Screening

Notify O/Os

Task (if needed)

Get more obs

(if possible)

High Accuracy Catalog Screenings:Deep Space: Every 12 hoursNear Earth: Every 8 hours

Ephemeris Screenings:High-Interest:On demandDeep SpaceRoutine: Every 12 hrsNear EarthRoutine: Every 8hrs

0-10 days prior to TCA

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Initial Screening Volumes

Screening Parameters

NE Basic 1km ellipsoid, 7 days

NE Advanced Advanced screening volumes, 7 days

NE Ephemeris 2km x 25km x 25km, 7 days

DS Basic 10km ellipsoid, 10 days

DS Advanced 20km ellipsoid, 10 days

DS Ephemeris 20km ellipsoid, 10 days

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Advanced Screening Volumes

Orbit Regime Orbit Regime Criteria/DefinitionPredict/

Propagate/ Time

Radial (km)

In-Track (km)

Cross-Track (km)

GEO1300min < Period < 1800 min

Eccentricity < 0.25 & Inclination < 35º

10 days 20 km ellipsoid

HEO 1 Perigee < 2000 km & Eccentricity > 0.25 10 days 20 km ellipsoid

MEO 600 min < Period < 800 min Eccentricity < 0.25 10 days 20 km ellipsoid

LEO 4 1200 km < Perigee ≤ 2000 km Eccentricity < 0.25 7 days 0.5 2 2

LEO 3 750 km < Perigee ≤ 1200 km Eccentricity < 0.25 7 days 0.5 12 10

LEO 2 500 km < Perigee ≤ 750 km Eccentricity < 0.25 7 days 0.5 28 29

LEO 1 Perigee ≤ 500 km Eccentricity < 0.25 7 days 2 44 51

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Reporting CriteriaREPORTING CRITERIA

Mode Space-Track Emergency CriteriaEmergency

Phone Call Criteria

Method CDM CDM, and emailCDM, email, and phone

call

Deep Space (DS)

(1) TCA ≤ 10 days and Overall miss ≤ 10km

(2) Advanced criteria: all results

TCA ≤ 3 days and Overall miss ≤ 5km

TCA ≤ 3 days and Overall miss ≤ 500 m

HEO(1) Reporting based on the regime of the secondary object in the predicted

conjunction at TCA using miss distance criteria only.(2) Advanced criteria: all results

MEO(1) TCA ≤ 3 days and

Overall miss ≤ 5km(2) Advanced criteria: all results

TCA ≤ 3 days andOverall miss ≤ 5km

TCA ≤ 3 days andOverall miss ≤ 500 m

Near Earth (NE)

(1) TCA ≤ 3 days and Overall miss ≤ 1km and Pc ≥ e^-4

(2) Advanced criteria: all results

TCA ≤ 3 days and

Overall miss ≤ 1km andPc ≥ e^-4

TCA ≤ 3 days and

Overall miss ≤ 1km andPc ≥ e^-2

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Increased Tasking Criteria

• If the primary or secondary object identified in a conjunction meet any of the following criteria, tasking to the sensor network will be increased:– Not tracked within 72 hours, or– Less than 20 obs in current DC, or– 2 or less sensors contributing to current DC, or– At least 1 component of covariance over 100,000 m2

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CA Emails

BASIC CA

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How to Name Ephemeris Files

<DataType>_<SCC#>_<CommonName>_<DDDHHMM>_<Operational/Special>_<Metadata>_<Classification>.txt

MEME(case sensitive)

Satellite Catalog #On-orbit: 5-digit SATCAT IDPre-cataloging: UCN, UCD

Common Name (no underscores):e.g. ISS or ISS(ZARYA)

Starting DTG-UTC:• Day of Year followed by time in hours/minutes• DDDHHMM (HHMM = start time of ephemeris)

OPERATIONAL:An “Operational” file represents where the satellite is planned to go and may or may not include maneuvers

• These files typically incorporate normal station-keeps, or represent a freefall orbit

• If maneuvers are included, the JSpOC assumes these will definitely occur. Otherwise, the files should be submitted as Special.

• “Operational” may be abbreviated as “OPER”, “OPS”, or “OP”• Only one operational file per satellite may be submitted at a

time – files with the same SCC# will replace each other

Metadata: Optional free text field – any value is acceptable, but most often used for maneuver information:

• nomnvr, or• mnvr (or mnvr01, mvr02, or burn01, burn02, etc) • Public/Private• HighInterest

SPECIAL:A “Special” file represents where the satellite is planned to go if a special maneuver is executed

• A “Special” file is used for planning purposes only, unless the maneuver becomes operational, in which case it must be resubmitted as “Operational”

• All “Special” files will be treated as high-interest• “Special” may be abbreviated “SPEC” or “SP”• Multiple special files may be submitted for the same satellite at

the same time

Only unclassified will be accepted• Must spell out “unclassified“• Not case sensitive

File extension must be .txt

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How to Submit/Manage Ephemeris

Submit:• Preferred: Space-Track.org Files Panel• Alternate: Email to jspocspacecorrespondence@us.af.mil• Manual GUIs or API uploads• 5 accepted formats: NASA, UTC, Generic On-Orbit, Modified

ITC, OEMManage:• Ephemeris currently autodeletes after 24 hours• Operator can only manually delete files…but it’s a huge help!• In the works…API deleteRecommendation: If you upload files and delete them and don’t

need a screening, please tell the CA Crew!

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How to Request Special Screenings

• Special Screening Requests: – 1 v 1, catalog– 1 v all, catalog– High-interest ephemeris, operational and special

• Communicate with CA Crew– Email or phone…or both!– Explain rationale – why high-interest: COLA? Maneuver? Deorbit? – Provide name of ephemeris file – Reference the ODR number, if applicable– State deadline that you need results

CA CREW CONTACT INFORMATION:jspocspacecorrespondence@us.af.mil

+1-805-605-3533

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How to Submit Maneuver Notifications

• Preferred: Through Space-Track.org using OPM• Alternate: Email• Very flexible format, but we greatly appreciate:

– Object, epoch and duration– Reason – especially if COLA! – Conjunction/TCA that is causing

COLA…or tell us that your decision is not based on a JSpOC prediction

• Designate as Public or Private• This is a work in progress – we

need your feedback!

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Orbital Data Request

• When is an ODR needed?– Early Orbit CA– Advanced CA– Anomaly Support– High-interest extended screening support: relocation, disposal, deorbit– Data redistribution (example: third party redistribution of your CDMs)– SP Ephemeris product

• Download the ODR form from Space-Track.org SSA Sharing page– Other forms may be needed: Form-22, R-15– https://www.space-track.org/documentation#/odr-examples_forms

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ODR Review Process

Acknowledged by SSA Sharing Cell

Routed for initial review by SSA Sharing Cell

ODR submitted to odr@space-track.org

Assigned tracking number

Resource Assessment Security Legal

Reviews consolidated by SSA Sharing Cell

Submitted to 18 SPCS/CC for final decision

Typically includes any combination of the following:• Conjunction Assessment (CA)• Advanced Analysis• Reentry Assessment• Launch• Launch CA• Catalog Maintenance• Sensor Optimization

[Continued on next slide]

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ODR Review Process

Submitted to 18 SPCS/CC for final decision

SSA Sharing Cell updates ODRs w/decision & caveats

SSA Sharing Cell notifies requester

of decision

SSA Sharing Cell creates procedure, if required

SSA Sharing Cell notifies requester

of decision

SSA Sharing Cell forwards ODR to STRAT for one-off

approval

Reviewed by STRAT/JS/OSD

SSA Sharing Cell notified

USG

If requester has an SSA Agreement or one-off approval is granted by USSTRATCOM

No SSA Agreement

[Continued from previous slide]

SSA Sharing Cell sends ODR & procedure to team responsible for execution

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18th Space Control Squadron

Questions?Contact the 18 SPCS SSA Sharing Team:

jspoc.ssasharing@us.af.mil

Resources:Spaceflight Safety Handbook for Operators

https://www.space-track.org/documents/JSpOC_Spaceflight_Safety_Handbook_For_Operators.pdf

Space-Track.org SSA Sharing Pagehttps://www.space-track.org/documentation#/odr-examples_forms

Space-Track.org Operator Panel Help Pagehttps://www.space-track.org/operator#/help