AP
A.J. Phillips
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2 records found
1
Embedded Spacecraft Fault Detection
A Hitchhiker's Guide to Explainable Thermal Anomaly Alerts for Downlink-Constrained Space Missions
Small satellites increasingly produce more housekeeping telemetry than can be continuously downlinked or inspected, delaying operator awareness of emerging spacecraft-health issues. This thesis develops an explainable on-board thermal anomaly-alerting pipeline for downlink-constrained small-spacecraft missions, using Delfi Twin as a case study. Rather than proposing a stand-alone anomaly-detection algorithm, it defines a deployment pathway linking telemetry scope, anomaly semantics, synthetic event-level evaluation, residual-to-alert decision logic, compact alert packets, and STM32L4-class embedded verification. A lightweight expected-temperature predictor is combined with residual scoring, cumulative evidence, persistence, hysteresis, transient-spike suppression, and explicit gap termination to form bounded detector events. A labelled synthetic benchmark enables quantitative evaluation, while FUNcube-1 telemetry provides qualitative stress evidence on real on-orbit data. Under matched-predictor conditions, all alert-worthy synthetic events were recovered, and STM32L4 replay demonstrated ample timing and memory margins. Flight performance and autonomous operational trust remain future validation tasks.
...
Small satellites increasingly produce more housekeeping telemetry than can be continuously downlinked or inspected, delaying operator awareness of emerging spacecraft-health issues. This thesis develops an explainable on-board thermal anomaly-alerting pipeline for downlink-constrained small-spacecraft missions, using Delfi Twin as a case study. Rather than proposing a stand-alone anomaly-detection algorithm, it defines a deployment pathway linking telemetry scope, anomaly semantics, synthetic event-level evaluation, residual-to-alert decision logic, compact alert packets, and STM32L4-class embedded verification. A lightweight expected-temperature predictor is combined with residual scoring, cumulative evidence, persistence, hysteresis, transient-spike suppression, and explicit gap termination to form bounded detector events. A labelled synthetic benchmark enables quantitative evaluation, while FUNcube-1 telemetry provides qualitative stress evidence on real on-orbit data. Under matched-predictor conditions, all alert-worthy synthetic events were recovered, and STM32L4 replay demonstrated ample timing and memory margins. Flight performance and autonomous operational trust remain future validation tasks.
L.O.V.E. mission
Life On Venus Exploration
Bachelor thesis
(2022)
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J.M. Rothenbuchner, A.J. Phillips, T.J.J. Goetzee, S. Dhiyaneeswaran, J.J.P. Bos, F. ten Voorde, N.P.J. van den Heuvel, D.J. Nieuwenhuizen, A.A. Land, C. Castro Garcia, J.A. Melkert
When searching for life we tend to imagine faraway exoplanets, and rarely do we think of our
own solar system. Although a lot of focus is put on Mars, Venus, our closest neighbor, could
currently host life. Temperatures of 475 ℃ and pressures 95 times what we experience on
Earth don’t offer the best conditions for life on the surface. However at high altitudes the
temperature and pressure drop until, in the area between 50 and 70 km, they approach those
of Earth. Here, amongst a thick deck of sulfuric acid clouds, it is speculated that life could
exist, perhaps in the form of bacteria living in suspended water bubbles.
The purpose of our mission is to design a remote sensing platform to perform in-situ
measurements on the atmosphere and soil composition of Venus, in an effort to learn more
about the planet while looking for specific biomarkers that could be attributed to life. ...
own solar system. Although a lot of focus is put on Mars, Venus, our closest neighbor, could
currently host life. Temperatures of 475 ℃ and pressures 95 times what we experience on
Earth don’t offer the best conditions for life on the surface. However at high altitudes the
temperature and pressure drop until, in the area between 50 and 70 km, they approach those
of Earth. Here, amongst a thick deck of sulfuric acid clouds, it is speculated that life could
exist, perhaps in the form of bacteria living in suspended water bubbles.
The purpose of our mission is to design a remote sensing platform to perform in-situ
measurements on the atmosphere and soil composition of Venus, in an effort to learn more
about the planet while looking for specific biomarkers that could be attributed to life. ...
When searching for life we tend to imagine faraway exoplanets, and rarely do we think of our
own solar system. Although a lot of focus is put on Mars, Venus, our closest neighbor, could
currently host life. Temperatures of 475 ℃ and pressures 95 times what we experience on
Earth don’t offer the best conditions for life on the surface. However at high altitudes the
temperature and pressure drop until, in the area between 50 and 70 km, they approach those
of Earth. Here, amongst a thick deck of sulfuric acid clouds, it is speculated that life could
exist, perhaps in the form of bacteria living in suspended water bubbles.
The purpose of our mission is to design a remote sensing platform to perform in-situ
measurements on the atmosphere and soil composition of Venus, in an effort to learn more
about the planet while looking for specific biomarkers that could be attributed to life.
own solar system. Although a lot of focus is put on Mars, Venus, our closest neighbor, could
currently host life. Temperatures of 475 ℃ and pressures 95 times what we experience on
Earth don’t offer the best conditions for life on the surface. However at high altitudes the
temperature and pressure drop until, in the area between 50 and 70 km, they approach those
of Earth. Here, amongst a thick deck of sulfuric acid clouds, it is speculated that life could
exist, perhaps in the form of bacteria living in suspended water bubbles.
The purpose of our mission is to design a remote sensing platform to perform in-situ
measurements on the atmosphere and soil composition of Venus, in an effort to learn more
about the planet while looking for specific biomarkers that could be attributed to life.