AVP Proposal Process
![AVP - Twin Otter](https://webarchive.library.unt.edu/eot2008/20080916164159im_/http://www.arm.gov/images/twinotter-twpice.jpg)
In 2006, the Twin Otter participated in the Tropical Warm Pool - International Cloud Experiment (TWP-ICE) in Darwin, Australia.
To acquire airborne measurements using the appropriate aerial vehicle and instruments, intensive field campaigns or long-term, regularly-scheduled flights can be requested through the ACRF field campaign process. Preproposals for AVP missions in FY 2010 are now being accepted; start your request here. Preproposals are due February 1. Smaller, less complex preproposals for FY 2008 and FY 2009 will be entertained at any time.
To learn more about the proposal review process and how you can request airborne measurements as part of an ACRF field campaign, please refer to the field campaign website and the IOP Request, Approval, and Implementation Process.