Smallsat Swarm Sparse Aperture SAR for Recon and Surveillance (SSSASAfRaS)

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC20C0022
Agency Tracking Number: 186342
Amount: $744,245.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: T4
Solicitation Number: STTR_18_P2
Timeline
Solicitation Year: 2018
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-02-14
Award End Date (Contract End Date): 2022-02-13
Small Business Information
590 Lipoa Pkwy, Ste 224, Kihei, HI, 96753-6911
DUNS: 079345244
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Bogdan Udrea
 (206) 227-8075
 bogdan.udrea@vissidus.com
Business Contact
 Rachel Campbell
Phone: (206) 617-2445
Email: rachel.campbell@vissidus.com
Research Institution
 University of Tennessee Space Institute
 411 B.H. Goethert Pkwy
Tullahoma, TN, 37388-4002
 Federally funded R&D center (FFRDC)
Abstract
The goal of Phase II work is to further advance the TRL of the swarm coordination and control algorithms from the current estimated TRL 3 to a TRL 4-5. The technical objectives proposed for Phase II are divided into two broad categories that support the goal. One category includes continuation and refinement of the work performed in Phase I and the other category includes new work, some of which has already been initiated.nbsp;Continuation work: C1) update the MATLAB/Simulink simulator to include dynamic closing and opening of inter-SV communications links and sensor noise; C2) simulate the loose swarm aggregation for the entire swarm using the maneuvers and control algorithms designed in Phase I; C3) simulate the transition from a loose swarm to a coordinated swarm configuration; C4) simulate orbit maneuvering of the coordinated swarm orbit to acquire its nominal orbit; C5) simulate the transition between a coordinated swarm to a nominal formation; and C6) simulate nominal operations to determine control and coordination strategies during the off and on duty cycles of the radar payloads. Nota bene: the simulation work also includes further controller development and upgrades, identification of new TPMs for swarm operations, and tracking the swarm performance with the TPMs described in the previous sections.nbsp;New work: N1) develop methods for and investigate swarm stability in the context of an ad hoc network between swarm members; N2) develop methods for and analyze swarm stability with nonlinear dynamics in the context of ESF; N3) design, implement, and test an ADCS for the SVs of the SSSASAfRaS swarm; N4) design optimal orbit maintenance maneuvers to keep the swarm operating in vLEO; and N5) implement select algorithms on a network of resource limited, commercial SBCs, and perform tests to verify their performance.nbsp;In addition to the objectives described above the SV design will be updated as informed by the results of the simulations described above.

* Information listed above is at the time of submission. *

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