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Fig. 5 | Earth, Planets and Space

Fig. 5

From: Orienting paleomagnetic drill cores using a portable GPS compass

Fig. 5

Temporal 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 compass

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