Checks if electromagnetic fields structure is valid
inputs: Input structure
grid: Interpolation grid structure
fields: Electromagnetic fields structure
IDL> check_fields, inputs, grid, fields
PRO check_fields, inp, grid, fields ;+#check_fields ;+Checks if electromagnetic fields structure is valid ;+*** ;+##Input Arguments ;+ **inputs**: Input structure ;+ ;+ **grid**: Interpolation grid structure ;+ ;+ **fields**: Electromagnetic fields structure ;+ ;+##Example Usage ;+```idl ;+IDL> check_fields, inputs, grid, fields ;+``` err_status=0 info,'Checking electromagnetic fields...' nr = grid.nr nz = grid.nz zero_string = {dims:0, type:'STRING'} zero_double = {dims:0, type:'DOUBLE'} nrnz_double = {dims:[nr,nz], type:'DOUBLE'} nrnz_int = {dims:[nr,nz], type:'INT'} schema = {time:zero_double, $ br:nrnz_double, $ bt:nrnz_double, $ bz:nrnz_double, $ er:nrnz_double, $ et:nrnz_double, $ ez:nrnz_double, $ mask:nrnz_int, $ data_source:zero_string} check_struct_schema,schema,fields,err_status, desc = "electromagnetic fields" if err_status eq 1 then begin goto, GET_OUT endif if fields.data_source eq '' then begin error, 'Invalid data source. An empty string is not a data source.' err_status = 1 endif if abs(fields.time - inp.time) gt 0.02 then begin warn,'Electromagnetic fields time and input time do not match' print,'Input time: ',inp.time print,'Electromagnetic fields time: ',fields.time endif fields = create_struct(fields, grid) GET_OUT: if err_status ne 0 then begin error,'Invalid electromagnetic fields. Exiting...',/halt endif else begin success,'Electromagnetic fields are valid' endelse END