Benefits

• Developed and tested over the last six years to eliminate limitations of previous replacement sensor models such as RPCs
• RSM works for virtually any imaging sensor: Frame, electro-optical, SAR, airborne, spaceborne, etc.
• RSM provides for equivalent extraction, accuracy prediction, mensuration, and triangulation (support data adjustment) capabilities relative to the original (rigorous) sensor model it replaces.
  Example: it provides virtually identical multi-image targeting solutions, including reliable accuracy predictions.
• RSM allows vendors to hide their proprietary sensor models while still providing an easy to use standard model.
• RSM is being adopted as an NITF standard by the NITF Technical Board (NTB)
  • RSM image support data contained in Tagged Record Extensions (TREs)
  • Validation by the NITF Technical Board (NTB) and the JITC testing organization
  • Working to make RSM an international ISO standard
• RSM reduces software costs by reducing the sensor models needed to be implemented and maintained within a software solution
  Example: many software packages are now trying to maintain over 40 sensor models and their ever changing support metadata (image support data)
• Increases operational readiness
  • Images corresponding to new/modified sensor (original sensor model) are immediately exploitable when using RSM.
• RSM technology is published within the new Manual of Photogrammetry
• RSM is already implemented in various U.S. government programs

RSM Documentation

Introduction

The ABCs of RSM: An introduction to the Replacement Sensor Model (PDF)

• Reader-friendly write-up
• Includes general sensor model and geo-positioning descriptions

Detailed Algorithm Description

Dolloff, John, “Replacement Sensor Models”, Chapter 11.3, Manual of Photogrammetry, 5th Edition, J. Chris McGlone editor, ASPRS, 2004.

Detailed Image Support Data Format Description

• Baseline RSM NITF 2.1 Tagged Record Extensions (TREs) are available on the NTB public website
• Improved subset of RSM TREs waiting for adoption (PDF)
  • Also documents corresponding improved RSM capabilities

Unclassified RSM Performance Studies

• Commercial spaceborne sensor – see Manual of Photogrammetry write-up
• RSM Extraction and Adjustment of Large Field of View Frame Imagery (PDF)

RSM modules

RSM Generator software module

• Currently available for Solaris and Windows, LINUX and IRIX coming soon
• API driven
• Community Sensor Model (CSM) compliant interface allowing plug-in architecture
• Tested and delivered to NGA sponsored JTW and MSP programs
• Allows “ground stations” to automatically generate RSM image support data for any image with corresponding CSM-compliant original sensor model

RSM Exploiter software module

• Available for Solaris and Windows, LINUX and IRIX coming soon
• API driven
• CSM compliant interface allowing plug-in architecture
• Tested and delivered to NGA sponsored JTW and MSP programs
• All functions associated with a sensor model are automatically provided to the user including ground to image, image to ground, error propagation, sensor parameter partial derivatives, etc.