An ideal documentation package would include the following:

1. addresses of model author(s) and contact (including e-mail)
2. list of subroutines/functions with brief description of their purpose
3. main program inputs and outputs
4. brief description of the model or application program
   1. data bases used in developing the model
   2. mathematical background and theoretical assumptions
   3. potential applications
   4. error estimates and uncertainties
   5. predecessor models and plans for updates
5. references

Source code must be provided and must adhere to vendor-nonspecific standards (e.g., Fortran 77), since the SPDF cannot commit to maintaining such software against operating system changes.

Publication of a paper describing the model in a peer reviewed journal is highly desirable and would enhance the acceptability of the model software into SPDF's archive. It is SPDF policy to ask software requesters to acknowledge the software source (e.g., model authors) in any publication resulting from the use of the software product. Special arrangements can be made if software authors foresee a more active role and involvement in the usage of their program and would like coauthorship on resulting papers.

New software can be submitted to the SPDF archive online or physical storage media (e.g., CD-R, diskette). If you have questions/comments about the various models available from SPDF, please contact: