Session
Poster Session 1
Location
Salt Palace Convention Center, Salt Lake City, UT
Abstract
- Student CubeSat missions using sub-$100 UHF radios are constrained by small packet sizes, making standard protocols (e.g., TCP, CFDP) too overhead-intensive for payload downlinks.
- We developed a Selective Negative Acknowledgement (SNACK)-based protocol for the Artemis CubeSat Kit bus to support reliable 160 × 120 LWIR thermal image transmission for the CubeSats for Climate Change Monitoring (C3M) mission
- A 45-byte SNACK bitmap acknowledges up to 360 packet fragments, minimizing retransmission overhead.
- Field tests from 5 m to 1.6 km achieved 72.2 kbps peak throughput and ≥98.7% final data integrity.
Document Type
Event
SSC26-P1-73 (1).pdf (15697 kB)
Aug 23rd, 12:00 AM
SNACK Protocol for Reliable High-Throughput Data Transfer on MTU-Constrained Low-Cost UHF Radios
Salt Palace Convention Center, Salt Lake City, UT
- Student CubeSat missions using sub-$100 UHF radios are constrained by small packet sizes, making standard protocols (e.g., TCP, CFDP) too overhead-intensive for payload downlinks.
- We developed a Selective Negative Acknowledgement (SNACK)-based protocol for the Artemis CubeSat Kit bus to support reliable 160 × 120 LWIR thermal image transmission for the CubeSats for Climate Change Monitoring (C3M) mission
- A 45-byte SNACK bitmap acknowledges up to 360 packet fragments, minimizing retransmission overhead.
- Field tests from 5 m to 1.6 km achieved 72.2 kbps peak throughput and ≥98.7% final data integrity.
