There are five example programs at both Fortran and C languages These programs should be linked against ners library. In additopm, there are four examples of python wrappers. These examples can be compiled with a make file that has the following lines .c.o: gcc -I${NERS_PREFIX}/include -c -o $*.o $*.c .f.o: gfortran -ffree-form -I$(NERS_PREFIX)/include -c -o $*.o $*.f # for gfortran .f.o: ifort -FR -fpp -I$(NERS_PREFIX)/include -c -o $*.o $*.f # for intel ifort compiler The following line should be added to the command line for linking: -L$(NERS_PREFIX)/lib -lners Here NERS_PREFIX is the prefix where NERS library is installed. 1) Test program NERS_FORTRAN_EXAMPLE_01 demonstrates how to compute the Earth rotation matrix that transform a vector in the rotating terrestrial coordinate system fixed with respect the Earth's crust to the inertial non-rotating celestial coordinate system. 2) Test program NERS_FORTRAN_EXAMPLE_02 demonstrates how to compute TAI time that corresponds to UTC time tag. The UTC time tag is expressed as sum of days elapsed since 2000.01.01_00:00:00 UTC epoch multiplied by 86400.0 and the UTC time tag with respect to the midnight. 3) Test program NERS_FORTRAN_EXAMPLE_03 demonstrates how to compute the time series of 8 Earth orientation parameters with a specified time step for the specified time range and print them as a table. NB: the units in the table are not SI units, but the non-standard units historically used in the past. 4) Test program NERS_FORTRAN_EXAMPLE_04 demonstrates how to learn the range of dates for which the NERS provides the Earth orientation parameters. NERS routine NERS_INQ returns either two ranges: 1) the range of the EOP forecast which is based on measurements, also called the data assimilation range and 2) the long-term prediction that is based in extrapolation, or the time epoch of the forecast generation. It is assumed that the EOP long-term prediction will be used only in a case of either NERS servers failure or a failure of the NERS client to establish Internet connection. 5) Test program NERS_FORTRAN_EXAMPLE_05 demonstrates how to compute elevation anglem, azimuth and hour anlge at a given moment of time for a station with given Carthezian coodinates observing a source with given right asension and declination. Test programs ners_c_example_01.c, ners_c_example_02.c, ners_c_example_03.c, ners_c_example_04.c, and ners_c_example_05.c are analogous to Fortran code. Python wrappers: a) ners_python_get_eop_example.py b) ners_python_utc_to_tai_example.py c) ners_python_azelha_example.py d) ners_python_transform_example.py