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(Mission Name) Aerosol/Cloud/Ecosystems (ACE)

Additional Aerosol/Cloud/Ecosystems (ACE) Concept Studies March 2007 M. Schoeberl & ACE/ACOB Definition Team. This document is subject to export controls under the International Traffic in Arms Regulations (ITAR) and may not be disclosed without prior permission from NASA. Mission Type: NAS

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(Mission Name) Aerosol/Cloud/Ecosystems (ACE)

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  1. Additional Aerosol/Cloud/Ecosystems (ACE) Concept StudiesMarch 2007M. Schoeberl & ACE/ACOB Definition Team This document is subject to export controls under the International Traffic in Arms Regulations (ITAR) and may not be disclosed without prior permission from NASA.

  2. Mission Type: NAS Mission Lead: GSFC Mission Goals: Aerosol impact on clouds and precip Ocean biology Notional Payload (dual spacecraft) Polarimeter Ocean color spectrometer Multi-beam and/or HSRL lidar Dual frequency Radar Low frq µ wave radiometer* High freq µ wave radiometer* Status White paper HQ Report, presentation Science team leads Schoeberl, Remer, McClain, Kahn Cost: $1.6 B LRD: 2015 (Mission Name) Aerosol/Cloud/Ecosystems (ACE) ACE IPCC 2007 * Optional instruments desired by the Science Team

  3. STM-based ACE/ACOB Instrument Requirement

  4. ACE/ACOB: Two Spacecraft Observing Geometry Orbit: 650 km SS ACOB B Multi-angle multi-wavelength polarimeter ACE/ACOB A ORCA Radiometers HF (Orange) LF (Purple) Cloud Radar Multi-beam Lidar ORCA (120º) Polarimeter & Radiometers (90º) Radar (nadir) 90º Lidar (30º) 30º

  5. Rough Costing of ACOB • Costs only include instruments to add-on to ACE B • GMI ~ $20M • SIRICE Radiometer ~$40M • Add contingency $18 M • Add science team $10 M • Total $88 M • ACOB/ACE A = $1,385 M • ACOB B = $242 M + $88 M = $330 M • Total ACOB cost = $1,715 M Adding the microwave instruments adds about 5.5% to the cost of ACE but increases its scientific capability significantly

  6. ACE/ACOB Subsets

  7. ACE/ACOB Phase II • Need to drive cost down without significant science loss • Trade space options • Trade coverage vs orbit altitude (lower altitude vs repeat time) • OSSE’s for aerosol science goals • Look at RSDO bus, co-manifest launch • Need to do a IMDC/TeamX for radar/radiometer platform • Instruments • Combine ORCA and Polarimeters • Combine HSRL and Multibeam • Add an ERB or improved IR instrument • Refine concept studies for: • Radar • HSRL & Multibeam lidars • Polarimeters • Radiometers Cost vs Science Concepts D C B A Cost Science Return

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