They are using American satellites I presume.
Perhaps it would be helpful if you specified which model in particular you are talking about? I am unaware of any sales of JDAM or JSOW to Israel, although the JDAM is not a particularly high tech piece of machinery.
I don’t have a clue. CNN and other media report they are using “LASER and satellite guided bombs”. That may be an error in reporting.
First International JDAM Sale:Boeing to Integrate Weapon on Israeli Aircraft (June, 2000)
Israel – Joint Direct Attack Munitions (June, 2004)
Joint Direct Attack Munition (JDAM)
Of the possible GPS system the Israeli’s could use, Glonass is in bad shape, and Galileo is in the future, which leaves the US system as the only game in town. Unless of course the Israelis launched themselves a secret mini-gps that’s also compatible with the JDAM hardware.