Send FREE SMS messages to Iridium AND ThurayA satellite phones
Free satellite handset SMS service brought to you from Applied Satellite Technology Ltd.
Use AST's SMS to satphone facility to send an SMS to either an Iridium or Thuraya satellite phone.
Iridium
http://messaging.iridium.com/
Thuraya
https://sms.thuraya.com/
Inmarsat IsatPhone Pro
http://www.inmarsat.com/Services/Land/IsatPhone/default.aspx#sendText