With the Galaxy Nexus and Ice Cream Sandwich launches drawing nearer, we're staring to learn about more software and hardware features, including the Galaxy Nexus' mysterious barometer. Dan Morrill, an Android engineer at Google, took to Google Plus and let the world know that the barometer is there to help with GPS lock-on. One of the three dimensions used in GPS lock-on is altitude, so the barometer is able to couple with existing aGPS features to speed up the lock-on process. The Galaxy Nexus isn't even the first device to have this sensor — Motorola's Xoom tablet also includes a barometer. While Morrill also notes that the barometer can be used to determine atmospheric pressure, he doesn't believe it is weather grade.