NavList:

   

Reply

Kermit is perhaps too pessimistic about French contributions to
fundamental astronomy being unknown to English speakers. The names
Pierre Bretagnon, Nicole Capitaine, and Agnes Fienga are all familiar to
me, about as familiar as Myles Standish and George Kaplan in the US, or
Patrick Wallace and Catherine Hohenkerk in the UK.

In my free SofaJpl Windows astronomy "engine" there a several bits of
France.

• IAU SOFA routines EPV00 (position and velocity of Earth). "The
function is a SIMPLIFIED SOLUTION from the planetary theory VSOP2000 (X.
Moisson, P. Bretagnon, 2001, Celes. Mechanics &  Dyn. Astron., 80, 3/4,
205-213) and is an adaptation of original Fortran code supplied by P.
Bretagnon (private comm., 2000)."

• IAU SOFA routine PLAN94 (position and velocity of the planets). "The
algorithm is due to J.L. Simon, P. Bretagnon, J. Chapront, M.
Chapront-Touze, G. Francou and J. Laskar (Bureau des Longitudes, Paris,
France)."

• IAU 2006 precession model. "This function returns the set of equinox
based angles for the Capitaine et al. "P03" precession theory, adopted
by the IAU in 2006."

• Long term precession model. "New precession expressions, valid for
long time intervals," J. Vondrák, N. Capitaine, and P. Wallace, A&A 534,
A22 (2011). Fienga is also cited in this work.

Unfortunately, the IMPOP ephemerides are not compatible with SofaJpl.
They are available in a format compatible with the JPL binary
ephemerides, but in SofaJpl 2.0 I changed to a streaming binary format.
It eliminates problems with fixed length tables and records, but is
unique to my software.

   

Reply