Fig. 5From: Orienting paleomagnetic drill cores using a portable GPS compassTemporal variations of a azimuths measured by the GPS compass relative to the sun compass and b numbers of satellites captured for the GPS signals for drill cores at coast and forest sites. Blue indicates data at a coast site (site 28, core 250) where the sky above is open, red indicates data at a forest site (site 31, core 114) where the vertical outcrop is covered by trees. At both sites data were not recorded during the first 5 min for initialization of GPS compassBack to article page