integer*8 peph
integer res
double precision jd0
double precision dt1
double precision G(6)

jd0 = 2451419
dt1 = 0.5D0
res = f90calceph_open(peph, "example2_rotangmom.dat")
if (res.eq.1) then

  res = f90calceph_rotangmom_unit(peph,jd0, dt1, NAIFID_EARTH,
&                              CALCEPH_USE_NAIFID+CALCEPH_UNIT_SEC,
&                              G)
  write(*,*) G

  call f90calceph_close(peph)
endif