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PreMic 5 – Rome, December 2017
Rojas-Quesada Mariela, [email protected]
Co-authors: Campos-Mora J, Céspedes-Ulate R, Montero-Montoya T, Rodríguez-Vargas
S, Salazar-López F, Segura-Hernández F, Quirós-Jiménez O, Fonseca-Naranjo G.
Organization: University of Costa Rica
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Introduction
[1]
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Introduction
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[2]
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Need
1
3
4
2
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Mission Objectives
Acquire correctly High Definition images of the Central American Territorial
Sea to monitor the blooming of the red tide during the lifetime of the mission.
[3]
[4]
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Acquire images in various spectrums with the Multispectral Cameras to
monitor the temperature and color variation on the water during the
lifetime of the mission, to predict and monitor algae blooms.
Mission Objectives
[5]
[6]
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Transmit the collected
information to the corresponding
ground station.
Mission Objectives
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RETI-Sat
reaches the
correct orbit.
Key Performance Parameters
[7]
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The
satellite
must be
pointing
towards
the Central
American
coast line.
Key Performance Parameters
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Key Performance Parameters
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The ADCS must ensure the required pointing condition.
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All three cameras have to turn on and work properly during
the lifetime of the mission.
Key Performance Parameters
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SWIR camera must has a resolution
better than 0.2 km2 per pixel.
Key Performance Parameters
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Images must
be sent
correctly to our
ground base
station.
Key Performance Parameters
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Space Segment Description
In the future the mission could be scalable to a
satellite constellations.
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Mission Payload
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Data SWIR HD LWIRSpatial Resolution (SWATH)
18362 m (Linear)38800 m x 25800
m
37546 m
(Linear)
Spectral range 350-1000 nm Visible
7800-13400 nmSpectrum
Sprectral 10 nmN/A
100 nm
Resolution (60 Bands) (50 Bands)
Area per Pixel18 m (Linear) 20 m2 115 m (Linear)
(Imaging)
Purpose Color variationObservation
visible spectrum
Temperature
maping
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Mechanical Subsystem
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Thermal Subsystem
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Attitude Determination and Control System
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Component Model Function Other
IMU MASIMU01 Micro
Aeroespace
Attitude
Determination
GPS piNAV-L1
NanoAvionics
Attitude
Determination
Reaction Wheels CubeWorld
CubeWheel
(Medium)
Pointing,
Stabilization
Max torque
1.0 mNm,
max storage
10.8 mNms.
Pointing
Accuracy <1
degree RMS.
Star Tracker Vectronic VST-41 Attitude
Determination(Bac
kup)
18 arcsec(x,y)
122 arcsec(z)
Thruster Aerojet
Rocketdyne
MPS120
Orbit Maintenance,
Momentum
Dumping
Isp 217s,
Total Impulse
2000 N-s.
Attitude Determination and Control System
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Electrical Subsystem
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Power Specifications Total
Safety Factor 1.5
Peak Power Consumption 245W
Average Power Consumption 150W
Solar Panel Efficiency 29%
Number of Solar Cells 130
Number of Battery Cells 10
Electrical Subsystem
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Command and Data Handling Subsystem
Communication System:
● UHF/VHF transceiver for TT&C
● S-Band transmitter for payload
images
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Attitude Determination and Control System
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Ground Base Station
Ref: ISIS UHF/VHF/S Band GBS
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[8]
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Link Budget
Ref: ISIS UHF/VHF/S Band GBS
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S-Band
(Downlink)
VHF
(Downlink)
UHF
(Uplink)
Pt 2.5 0.2 0.2w
Gr 31.35 12.3 15.5dB
Noise figure 0.9 1.6 2dB
Height 538000 538000 538000m
Downlink (freq) 2000000000 146000000 4380000hz
Speed B (of bits) 6000000 9600 1200bits s-1
Eb/N0 in dB 10.9 28.7 70.2>10
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Cost Table
Component Approximate Price ( USD )
Payload (Optical Subsystem) $85.000
Electrical Subsystem $60.000
Mechanical Subsystem $ 60.000
Command and Data Handling Subsystem $ 60.000
Attitude Determination and Control $100.000
Ground Base Station $ 40.000
Launch $160.000
HR (Development , Test and Operation ) $1.000.000
Total $1.565.000
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Implementation Plan
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Development and Management
Information Usage
(Regional)
Information Usage
(Local)
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Mission Schedule
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Sustainable Development Goals
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[9]
Life below water
Life on land
Zero hunger
Good health
Climate action
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Transmit Data to GBS
Launching in Ariane V
Two Multispectral Cameras & HD Camera
Monitor the Red Tide in
Central America
Help address the impact of Red Tide
Mission Overview
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Reference List[1] O. Pacheco-Urpf
[2] NTDTV, Red Tide Fishifies Costa Rican Coastline. 2009.
https://www.youtube.com/watch?v=BCOy-2ohFR4
[3] El Tiempo Yucata, 2017.
[4] DiCYT, Marea Roja. 2014.
[5] D. Payne, Thermal Analysis. 2013
[6] UTEXAS, AVIRIS hyperspectral data cube over Moffett Field
[7] ESA, Ariane 6. 2017. https://www.youtube.com/watch?v=kcKL_qR1dXM
[8] Full Gorund Station Kit VHF/UHF/S-band, Innovative Solutions in Space.
https://www.isispace.nl/product/full-ground-station-kit-for-vhfuhfs-band/
[9] http://www.un.org/sustainabledevelopment/blog/2015/12/sustainable-development-goals-
kick-off-with-start-of-new-year/
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PreMic 5 – Rome, December 2017