#!/bin/bash

PERIOD=2  ### Period in days
NP1=14    ### Number of periods beginning
NP2=24    ### Number of periods end

let n1=$PERIOD*24*$NP1-1
let n2=$PERIOD*24*$NP2-1
echo $n1
echo $n2

ncks -d time_counter,${n1},${n2} NAA10KM_1h_20000101_20001231_bflux.nc window_NAA10KM_1h_20000101_20001231_bflux.nc
ncra window_NAA10KM_1h_20000101_20001231_bflux.nc mean_window_NAA10KM_1h_20000101_20001231_bflux.nc