Space Systems Engineer · INPE

Ronan Arraes
Jardim Chagas, Ph.D.

I design and analyze spacecraft missions and develop attitude and orbit control subsystems (AOCS) at the Brazilian National Institute for Space Research. I was mission architect and AOCS lead for Amazonia 1 — successfully launched in February 2021 — and currently hold the same roles for the projects Amazonia 1B, CBERS 06, and CO2Image. I also build open tooling for the Julia language ecosystem.

INPE · DISEP Mission Architect · AOCS Lead São José dos Campos, BR
01

Projects

// featured projects

Space missions

LEO · PMM Launched · Feb. 2021

Amazonia 1

Low Earth orbit remote sensing satellite based on the multi-mission platform (PMM).

Payload
WFI camera with 67 m resolution and 838 km swath, with a 5-day revisit.
Role
Mission architect and AOCS technical lead
LEO · PMM In development

Amazonia 1B

Low Earth orbit remote sensing satellite based on the multi-mission platform (PMM).

Payload
MUX camera with 20 m resolution and 120 km swath, with a 26-day revisit.
Role
Mission architect and AOCS technical lead
LEO · PMM In development

CBERS 06

Low Earth orbit remote sensing satellite based on the multi-mission platform (PMM).

Payload
Synthetic aperture radar (SAR).
Role
Mission architect and AOCS technical lead
LEO · P100 In development

CO2Image

Low Earth orbit remote sensing satellite based on the P100 platform.

Payload
Multispectral camera for CO2 measurements.
Role
Mission architect and AOCS technical lead

Other

SW · AOCS In development

AOC

Development of the next version of INPE's attitude and orbit control software.

Role
Technical lead
Languages
Julia and C++
SW · Analysis Operational

SatelliteDesign.jl

A Julia toolkit for designing the AOCS and performing satellite fuel-budget analysis.

Role
Technical lead
Languages
Julia
SW · Telemetry Operational

Telemetry Analysis

A suite of Julia packages for analyzing satellite telemetry. It currently generates daily reports for mission architects indicating the operational state of Amazonia 1.

Role
Technical lead
Languages
Julia
SW · Analysis Operational

Forplan Sat. Simulator

Operational-concept simulator for a space mission, used for system-level validation in pre-phase A studies.

Role
Developer
Languages
Julia and C++
Registration
INPI BR 512020000534-9
02

Research Areas

// what I work on
001

Space Systems

  • Mission analysis
  • Orbit design
  • Fuel budget
  • Pointing budget
  • Celestial mechanics
  • Trajectory planning
002

Attitude and Orbit Control

  • Actuator design
  • Sensor design
  • Simulator design
  • Software programming
003

Statistical Signal Processing

  • Kalman filtering
  • Extended Kalman filtering
  • Unscented Kalman filtering
  • Particle filtering
  • Maximum likelihood estimate
  • Distributed estimation
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Open Source

// maintained packages
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Writing

// blog & tutorials

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