  A low-cost, stand-alone Global-Positioning-System-time-synchronized data
acquisition system is described. The constructed prototype allows recoding up
to four analog signals with a 16-bit resolution in variable ranges and a
maximum sampling rate of 1000 S/s. Additionally, two digital readouts of
external sensors can be acquired. A complete data set is stored on a Secure
Digital (SD) card or transmitted to a computer using Universal Serial Bus
(USB). The estimated time accuracy of the data acquisition is better than 0.2
{\mu}s. The device is envisioned for the use in a global distributed sensor
network (the Global Network of Optical Magnetometers for Exotic physics -
GNOME), whose aim is to search for new particles and interactions.
