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Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring
Thesis (MEng)--Stellenbosch University, 2026.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2026
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| _version_ | 1867614071166074880 |
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| access_status_str | Open Access |
| author | Msonkho, Mayamiko Mark |
| author2 | Barnard, Arno |
| author_browse | Barnard, Arno Msonkho, Mayamiko Mark |
| author_facet | Barnard, Arno Msonkho, Mayamiko Mark |
| author_sort | Msonkho, Mayamiko Mark |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2026. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/136137 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:46:11.731Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/136137 Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring Msonkho, Mayamiko Mark Barnard, Arno Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Thesis (MEng)--Stellenbosch University, 2026. Msonkho, M. M. 2026. Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/cf9e7522-066d-42da-889a-f23a5eee647c Direct-to-Satellite (DtS) uplinks by many low-power devices create a classic many-to-one contention problem during short visibility windows. This work proposes a hierarchical mesh→gateway→satellite architecture and a lightweight contention-mitigation protocol that combines randomized backoff with a Time Division Multiple Access (TDMA) style slotting. A simulation was developed that shows a gateway discovery model (effective slot budget B, per-window randomized access, deterministic polling once discovered) with an implementation of a Meshtastic-based ground-mesh model. Under standard assumptions (aligned slots, no doppler, benign adjacent-channel interference), the discovery model predicts fast convergence for small gateway populations: most gateway register within one to a few windows (mean ≈2.9 windows in the runs), bounded collisions, and stable acknowledgement→data-request→gateway-data handshakes. We validate end-to-end behavior with three experiments of increasing difficulty: a static lab setup with the whole system on a desk, a 5.09km urban roof link, and a high-altitude balloon (5.6km altitude, 12.43km slant range). Across these experiments or tests, performance degrades smoothly with Received Signal Strength Indication (RSSI) or Signal to Noise Ratio (SNR) (negative-SNR fraction 0%→15%→35%). Differences between simulation and practice (e.g., 20 measured packets per cycle vs. 14 intended) are traced to firmware-level retries or fragmentation and realistic Radio Frequency (RF) impairments (fading, motion), not to flaws in the scheduling design. The results show that gateway pre-aggregation and a minimal discovery overlay provide a practical path to reliable DtS uplinks on resourceconstrained radios, and they highlight concrete radio-engineering factors (antenna gain or placement, cabling, mounting stability) for robust deployments and future orbital campaigns. Masters 2026-04-23T09:18:07Z 2026-04-23T09:18:07Z 2026-03 Thesis https://scholar.sun.ac.za/handle/10019.1/136137 en Stellenbosch University 143 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Msonkho, Mayamiko Mark Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title | Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title_full | Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title_fullStr | Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title_full_unstemmed | Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title_short | Integration of Wireless Sensor Network with CubeSat Satellite System for Enhanced Agricultural Monitoring |
| title_sort | integration of wireless sensor network with cubesat satellite system for enhanced agricultural monitoring |
| url | https://scholar.sun.ac.za/handle/10019.1/136137 |
| work_keys_str_mv | AT msonkhomayamikomark integrationofwirelesssensornetworkwithcubesatsatellitesystemforenhancedagriculturalmonitoring |