>>>> install spectra tool and spherepack 3.2 library with pgf90 or ifort
(g95,gfortran... not  possible yet)

wget -c https://www2.cisl.ucar.edu/sites/default/files/spherepack3.2.tar
tar -xvf spherepack3.2.tar
cd spherepack3.2

>>>> install spherepack 3.2 library
>for pgf90, after discussion with Richard A. Valent (valent@ucar.edu), change line 12 of make.inc in spherepack3.2 folder:
  F90 := pgf90 -module ../lib -I../lib
and replace by
  F90 := pgf90 -r8 -module ../lib -I../lib
to run in double precision (better).

>for ifort:
change line 10 to 20 of make.inc
  ifeq ($(PGI),pgf90-Warning-No files to process)

    F90 := pgf90 -module ../lib -I../lib
    CPP := pgf90 -E

  else

    F90 := g95 -DG95 -g -fmod=../lib -I../lib 
    CPP := g95 -E -DG95

  endif
and replace by
  F90 := ifort -r8 -module ../lib -I../lib
  CPP := ifort -fpp
change line 16 of test/Makefile
	$(F90) $< -o $@ -L../lib -l spherepack
and replace by
	$(F90) $< -o $@ -L../lib -lspherepack
	

> make all > log_install 2>&1

> OK 'lib' ,... are in /planeto/milmd/library/spherepack/spherepack3.2_levan_pgf90


>>>> compile spectra_analysis program with pgf90 or ifort

cd ..

change the first 3 lines of the makefile: path of spherepack library you have just installed, path of netcdf libray, compiler
netcdfpath=/planeto/milmd/library/netcdf/netcdf-4.0.1_levan_pgf90 (on levan)
netcdfpath=/smplocal/pub/NetCDF/4.1.3/seq (on ada)
netcdfpath=/usr/local (on gnome)
spherepackpath=/path/to/spherepack3.2
FC=pgf90 or ifort

make spectra_analysis

>>>>> test on some harmonic cases

> compile test program
make test_analysis

> create harmonic winds
./test_analysis

> compute kinetic energy spectrum for one harmonic
./spectra_analysis harmonic_64x48_lmdz_22.nc -alt none -time none -o harmonic_64x48_lmdz_22_spectra