2 Axis Digital Sun Sensor ST0075848 v004 05
2
0075848 v004.04 – July 2011 © Surrey Satellite Technology Ltd. Tycho House, 20 Stephenson Road, Surrey Research Park, Guildford, Surrey, GU27YE, United Kingdom Tel: +44(0)1483803803 | Fax:+44(0)1483803804 | Email: [email protected] | Web:www.sstl.co.uk Applications LEO Missions Earth Observation Missions Space Science Missions Momentum Unloading 2-AXIS DMC SUN SENSOR Features – Reliable attitude determination – The output from each axis consists of 2 analogue 0 - 5 Volt signals (A & B) which are combined and linearised using a calibration polynomial function to obtain the relevant sun angles – Temperature sensing Interfaces – Analogue Inputs/Outputs – D-Type DC Connector Key Specifications – Sensors: 2 orthogonal axes – Sensor field of view: ± 50 º – Accuracy: 1.0º (95%) – Analogue output: 4× 0-5V per channel Heritage (63+ orbit years) – FASAT-Bravo – Uosat-12 – TopSat – Beijing-1 Other SSTL AOCS Products – Reaction Wheels – Star Trackers – Magnetometers – Gyros – Magnetorquer Sunlit: <100mW; Dark: <10mW Power consumption 20kRad (Si) Radiation Tolerance 1.0°(95%) Accuracy 2 orthogonal axes Sensors 15Grms in all axis Random Vibration -20 to +50ºC operating -40 to +80ºC non- operating Temperature ± 12V Power Supply 95 x 107 x 35 mm Dimensions 300g Mass 4x 0-5V per channel Analogue output ± 50° Sensor field of view Bare sun sensor unit. Can be supplied with a variety of applied thermal surfaces
Transcript of 2 Axis Digital Sun Sensor ST0075848 v004 05
0075848 v004.04 –July 2011
© Surrey Satellite Technology Ltd.
Tycho House, 20 Stephenson Road, Surrey Research Park, Guildford, Surrey, GU27YE, United KingdomTel: +44(0)1483803803 | Fax:+44(0)1483803804 | Email: [email protected] | Web:www.sstl.co.uk
ApplicationsLEO MissionsEarth Observation MissionsSpace Science MissionsMomentum Unloading
2-AXIS DMC SUN SENSOR
Features– Reliable attitude determination– The output from each axis consists of
2 analogue 0 - 5 Volt signals (A & B) which are combined and linearised using a calibration polynomial function to obtain the relevant sun angles
– Temperature sensing
Interfaces– Analogue Inputs/Outputs– D-Type DC Connector
Key Specifications– Sensors: 2 orthogonal axes– Sensor field of view: ± 50 º– Accuracy: 1.0º (95%) – Analogue output: 4× 0-5V per channel
Heritage (63+ orbit years)– FASAT-Bravo– Uosat-12– TopSat– Beijing-1
Other SSTL AOCS Products– Reaction Wheels– Star Trackers– Magnetometers– Gyros– Magnetorquer
Sunlit: <100mW; Dark: <10mW
Power consumption
20kRad (Si)Radiation Tolerance
1.0°(95%)Accuracy
2 orthogonal axesSensors
15Grms in all axisRandom Vibration
-20 to +50ºC operating-40 to +80ºC non-operating
Temperature
± 12VPower Supply
95 x 107 x 35 mmDimensions
300gMass
4x 0-5V per channelAnalogue output
± 50°Sensor field of view
Bare sun sensor unit. Can be supplied witha variety of applied thermal surfaces
Surrey Satellite Technology LimitedSSTL has launched over 34 satellites gaining almost 200 years in-orbit experience. SSTL draws on its world-class expertise in both small satellite platform technology and high and medium resolution optical instruments. SSTL provides complete turn-key system solutions; spacecraft, ground station, launch, operations and image processing.
SSTL is unique in the space industry; able to design, manufacture and integrate multiple satellites in-house.
Changing the economics of spacewww.sstl.co.uk
© Surrey Satellite Technology Ltd.
Tycho House, 20 Stephenson Road, Surrey Research Park, Guildford, Surrey, GU27YE, United KingdomTel: +44(0)1483803803 | Fax:+44(0)1483803804 | Email: [email protected] | Web:www.sstl.co.uk
2-AXIS DMC SUN SENSOR
SSTL is ISO9001:2008 certified
Subsystems are manufactured to:– ECSS Q-ST-70-08C– ECSS Q-ST-70-38C– All work overseen by ESA-trained
assembly staff
Standard delivery service includes:– compliance testing– vibration test– thermal cycling– user manual– test results– export license and shipping– thermal vacuum testing available– unit can be supplied prior to
environmental testing
Typical sun sensor output
Typical Sun Sensor Output
0.2
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0.7
0.8
-60 -40 -20 0 20 40 60
Sun Angle (deg)
Mea
sure
d O
utpu
t (R
atio
& V
olt)
A/(A+B)
A-channel
B-channel
Errors in azimuth and elevationfollowing calibration
