NASA IceBridge Paroscientific S-1000 L1B Pressure Altimeter Time-Tagged Air Pressure data for 2011 Antarctica are now available from NSIDC. See the IceBridge Paroscientific S-1000 L1B Pressure Altimeter Time-Tagged Air Pressure Web page at http://nsidc.org/data/iaprs1b.html for more information.