NASA provides a visualization software called Panoply. There is a Credits and Acknowledgments page that acknowledges and lists the licenses of software dependencies, but provides no information about its own license.
The closest information that I can find is in the FAQ for the global climate model EdGCM Global that says the code is in the "public domain"
- is it standard practice at NASA to release code into the public domain?
- are there exceptions?
- Can I assume that Panoply is public domain and can be used without restriction other than than those imposed by licenses of software dependencies?
- Is the absence of specific permission to reuse the code a concern (this issue was raised in the answer to a separate question)
- How common is this practice across government agencies?