The NASA-ISRO Synthetic Aperture Radar (NISAR) space mission is a collaboration between NASA and the Indian Space Research Organization (ISRO), launching in the 2020s to a polar orbit of 747km altitude. The mission will provide spatial and temporal measurements of land surface changes (e.g. ice sheets, vegetation, earthquakes). Many of the SAR electronics boxes are mounted on the exterior of the structure. Their singlewall box lids efficiently radiate heat for thermal control, but are not very efficient debris shields. The initial design showed an unacceptably high impact risk as estimated with NASA’s ORDEM3 debris model and Bumper impact analysis tool. Each box has a different role in instrument functionality, and this was captured in a reliability model used to optimize the distribution of shield mass among the boxes: total added mass was minimized while maintaining a threshold of functionality and survival probability that was acceptable to the project.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Optimization of Debris Shields on the NISAR Mission’s L-Band Radar Instrument


    Contributors:

    Publication date :

    2017-04-18


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English



    The NISAR Mission’s Capabilities for Natural Hazard Monitoring

    Shrinivas, Rao / Manjusree, P / Jones, Cathleen E | NTRS | 2021



    The NASA-ISRO (NISAR) mission dual-band radar instrument preliminary design

    Sagi, Raju / Bhan, Rakesh / Misra, Tapan et al. | NTRS | 2017


    Radar Back End for NASA/ISRO Synthetic Aperture Radar (NISAR) Instrument

    Quddus, Momin / Custodero, Brian / Volain, Barry et al. | IEEE | 2022


    Instrument commissioning timeline for NASA-ISRO Synthetic Aperture Radar (NISAR)

    Sharma, Priyanka / Doubleday, Joshua R. / Shaffer, Scott | IEEE | 2018