#!/bin/bash

# (1) Get wireless iface #
IFACE=`ifconfig | grep -o -P "^w\w+"`;

# (2) Get Access Point ID #
AP=`iwconfig $IFACE | grep -o -P 'ESSID:"SATS_.+"' | sed 's/ESSID:"SATS_//' | sed 's/"$//'`;

echo $AP;