#!/bin/bash

op_date_list='20170426 20170427 20170428 20170429 20170430 20170501 20170502 20170503'

for gdName in grd1 grd2 grd3 grd2s grd3s grd3o
do
  mkdir $gdName
  c=0
  echo $gdName
  for op_date in $op_date_list
  do
    c=$(($c+1))
    op_day=op_day0$c
    echo $op_day
    ln -sb ../${gdName}_${op_date} ./${gdName}/$op_day
  done
done