CasEx

Implementation of the mathematics behind JARUS WG-6 SORA Annex F.

Overview

This package was created to support the mathematical models used to derive the iGRC tables and supporting material found in JARUS WG-6 SORA Annex F [3]. It implements the models for computing critical areas, effect of obstacles, ballistic descent, effect of explosions and deflagration that are being used in Annex F. It also includes easy access to the specific choice of parameters that are used in Annex F.

There are a number of examples of how to use this package that operators and others can use as a starting point for doing their own computations as an alternative to using the iGRC table and supporting tables in Annex F and in the SORA.

Finally, this packages can be used for easily recreating some of the figures found in Annex F (see example 8).

The mathematical models implemented in the package are the results of the combined effort of the Quantitative Methods subgroup under Working Group 6.

Installation

To install CasEx, simply run the following command in your terminal.

pip install casex

Table of Contents

• Background
• Contributors
• Examples
  • Example 1: Critical area
  • Example 2: Vector input
  • Example 3: Variations of iGRC table
  • Example 4: Tradeoff iGRC tables
  • Example 5: Isoparametric critical area plot
  • Example 6: Ballistic descent
  • Example 7: JARUS model vs the iGRC values
  • Example 8: Obstacles
  • Example 9: Recreating Annex F figures
• Bug fixes
  • Version 1.2.3
  • Version 1.2.2
  • Version 1.2.1
  • Version 1.2.0
  • Version 1.1.11
  • Version 1.1.10
• Reference
  • AircraftSpecs
  • AnnexFParms
  • AnnexFTables
  • BallisticDescent2ndOrderDragApproximation
  • Constants
  • Conversion
  • CriticalAreaModels
  • Enums
  • Exceptions
  • ExplosionModels
  • Figures
  • FrictionCoefficients
  • misc
  • Obstacles

Indices and tables

• Index

• Module Index

• Search Page

1

John A. Ball, Michael Knott, and David Burke. Crash Lethality Model - Report no. NAWCADPAX/TR-2012/196. Technical Report, Naval Air Warfare Center Aircraft Division, 2012.

2

Meredith J. Harwick, John Hall, John W. Tatom, and Robert G. Baker. Approved Methods and Algorithms for DoD Risk-Based Explosives Siting. Technical Report, DDESB, jul 2009.

3

JARUS. JARUS guidelines on SORA - Annex F - Theoretical Basis for Ground Risk Classification. Technical Report, 2022. JAR-WG6-QM.01.

4

A. la Cour-Harbo and H. Schioler. How obstacles may reduce the impact of a crashing unmanned aircraft. Preprint, pages, 2021.

5

Anders la Cour-Harbo. Ground impact probability distribution for small unmanned aircraft in ballistic descent. In 2020 International Conference on Unmanned Aircraft Systems (ICUAS), 1442–1451. Aalborg University, IEEE, sep 2020. doi:10.1109/ICUAS48674.2020.9213990.

6

Robert M. Montgomery and James A. Ward. Casualty Areas from Impacting Inert Debris for People in the Open - RTI Report No. RTI/5180/60-31F. Technical Report, Research Triangle Institute, 1995.

7

Department of Defense. DoD Ammunition and Explosives Safety Standards: General Explosives Safety Information and Requirements (DOD 6055.09-M, Volume 1). Technical Report, 2012.

8

Federal Aviation Administration. Flight Safety Analysis Handbook Federal Aviation Administration. Technical Report, Federal Aviation Administration, sep 2011.

9

Range Commanders Council. Range safety criteria for unmanned air vehicles - rationale and methodology supplement. Supplement to document 323-99. Technical Report, Range Commanders Council, 2001.