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Director's Discretionary Time Proposal Kit


Director's Discretionary Time (DDT)

DDT Review Deadlines:
February 28, 2017
September 12, 2017
April 10, 2018

Read Me First!

To submit a Spitzer DDT proposal fill out this online submission form, which includes:

  • Standard coversheet information (PI and Co-I contact information, proposal title, etc, as for a regular General Observer submission).
  • Complete Astronomical Observation Requests (AORs).
  • A strong scientific justification (must be in PDF format), specifying why the request was not submitted during the normal Call for Proposals and the long-term legacy value of the observation. Please use the templates:

Please upload both the science justification and the AORs via the online form.

Note that requests for DDT cannot be used to resubmit all or part of a proposal that was rejected by the normal peer review process.

Guidelines for Submission of Director's Discretionary Time Proposals



The Cycle 13 Call for Proposals is now closed.
Proposals Due:    Wednesday, June 8, 2016, 4pm PDT

AOR file parser - perl script for preparing observation summary table from your AORs.
Older Calls for Proposals
Proposal and Program Statistics

A longer cookbook-style document on how to go from an idea to a set of fully-functional Astronomical Observation Requests (AORs) for your Spitzer proposal.
Spot is a software package used by Spitzer observers to plan observations, and Leopard is a software package used to query the archive. Together, this group of cats is referred to as the "Spitzer Pride."