You are listed in the Triana web site as a possible proposer of the
Triana system.

As you are no doubt aware that NASA has just added an opportunity for
SOHO replacement instruments to be added to Triana.

I am the PI of the SOHO Michelson Doppler Imager experiment.  MDI has
been very successful in the first two years of SOHO and produced many
important and visible results.  We are far from completing the planned
investigation with MDI.  I am very interested in seeing a clone of the
MDI instrument added to the Triana payload.

Prior to adding the SOHO option to the Triana AO, NASA asked me for a
ballpark cost figure to provide an MDI for Triana then they asked me if
it would be possible in a year.  They seemed pleased with my
responses.

According to the AO, NASA is looking for complete Triana proposals with
add-on instruments included.  This would seem to be nearly impossible
to accomplish at this late date.  I believe that most of the SOHO
replacement instrument add-on proposals will be submitted independently
with the expectation that NASA will join the selected add-on
instruments to the selected Triana proposal.  I will submit such a
proposal.

Nevertheless, if you are planning on submitting a Triana proposal
and would like to discuss a collaboration now please contact me.  You
could also contact Art Poland (apoland@solar.stanford.edu is a link) at
Goddard to contact all of the SOHO instrument groups who are likely to
propose.

You can see more about the MDI instrument via the Solar Oscillations
Investigation website:  http://soi.stanford.edu

You can contact me via pscherrer@solar.stanford.edu or 650-723-1504

Thank You,
Phil Scherrer