Skip to contentScholarGate
LibraryBookshelfDeskReview StudioAssistant
Sign in
SGP4 TLE Propagation/Evidence
Method evidence record

SGP4 TLE Propagation

SGP4 (Simplified General Perturbations 4) is a rapid orbital propagation method that predicts satellite position and velocity from Two-Line Element (TLE) sets published by NORAD. Developed in the 1970s, SGP4 accounts for atmospheric drag, gravitational perturbations, and solar radiation pressure using simplified analytical models. SGP4 is the de facto standard for space surveillance, conjunction assessment, and satellite tracking.

Sources recorded, not reviewed

Source record

Citations copied verbatim from the method’s source record. No claim-level verification is inferred from them.

Simplified General Perturbations 4 with Two-Line Element Set
Taxonomic method record · process-pipeline / aerospace
  • Vallado, D. A., Crawford, P., Hujsa, R., & Kelso, T. S. (2006). Revisiting Spacetrack Report Number 3. In AIAA/AAS Astrodynamics Specialist Conference. · DOI 10.2514/6.2006-6753
  • Kelso, T. S. (1995). Analysis of the Iridium 33/Cosmos 2251 Collision. CelesTrak. · URL
  • Hoots, F. R., & Roehrich, R. L. (1980). Models for Propagation of NORAD Element Sets. Spacetrack Report No. 3. · URL
Open full method

Curated claims

Claims persisted in the evidence ledger, each with its own assessment.

No curated claims yet

This view does not invent a claim assessment when the ledger has none.

Related methods

Generated from the method graph and shown as machine-suggested relations — no evidence claim is inferred.

Same method familyB-Dot Controllermachine-suggested · Relational suggestion, not evidence.Same method familyQuaternion Attitudemachine-suggested · Relational suggestion, not evidence.Same method familyTCASmachine-suggested · Relational suggestion, not evidence.

Evidence status

Sources recorded, not reviewed

Bibliographic sources are present. Claim-level evidence review has not been performed.

Sources

3 recorded citations, copied from the method source record.

Actions

Open method page
ScholarGate

A content-first reference library for research methods — what each one is, how it works, and where it comes from.

Open data (CC-BY)

Explore

  • Library
  • Search the library…
  • Browse by field
  • Fields
  • Journey
  • Compare
  • Which method?

Reference

  • Subjects
  • Atlas
  • Glossary
  • Methodology
  • Philosophy

Your tools

  • Bookshelf
  • Desk
  • Chat

Company

  • About
  • Pricing
  • Contact
  • Suggest a method

Entries are compiled from published sources for reference. Verifying the accuracy and suitability of any information for your own use remains your responsibility.

© 2026 ScholarGate · A research-method reference library
  • Privacy
  • Cookies
  • Terms
  • Delete account