ADM-Aeolus will gather data using the active Doppler Wind Lidar (DWL) method, whereby an active instrument emits laser pulses into the atmosphere and measures the Doppler shift of the collected return signal, backscattered at different levels in the atmosphere, creating a wind profile showing the relative strength of winds at different altitudes, as well as moisture and dust levels in the atmosphere.
Aeolus’ instrument is Aladin (Atmospheric LAser Doppler INstrument), a direct detection lidar incorporating a fringe-imaging receiver (analysing aerosol and cloud backscatter) and a double-edge receiver (analysing molecular backscatter). The mission is named after the mortal in Greek legend appointed by the gods as keeper of the winds.
Astrium is prime contractor for the Aeolus mission, and also responsible for the Aladin instrument, platform electrical architecture and subsystems.
Customer European Space Agency Mission Global measurement of wind profiles Orbit • 400km Dawn-Dusk Sun Synchronous Orbit
• Ground Track Repeat: 7 days
• Orbit Inclination: 97˚
Spacecraft • Power: 1401W orbit average
• Data rate: Downlink 10Mbps
Payload ALADIN (Atmospheric Laser Doppler Instrument) Features ALADIN Laser:
• UV 355nm
• Pulse Energy 120mJ @ 100Hz
• Wind measured up to 30km altitude
• Measuring accuracy:
0-2km = 1m/s
2-16km = 2m/s
Launch Mass 1366 kg Dimensions 1.74 x 1.90 x 2.00m Launch Date 2016 Mission Duration Operational Lifetime: 3 years Astrium Responsibilities • Prime contractor
• ALADIN Instrument design and build
• Electrical systems