Abstract : Weston Observatory (Boston College) has maintained a geomagnetic observatory to continuously monitor changes in the geomagnetic field and to provide standards for magnetic instrumentation and to maintain a coil system in which a wide variety of magnetic instrumentation can be tested and calibrated to support AFGL RESEARCH. The observatories in Project MAGAF have been installed and maintained. The secular change in the geomagnetic field at Weston is detailed for the past six years. Modifications have been made in the network instrumentation to insure reliability and accuracy of the data digitally transmitted to Hanscom AFB. A three component magnetic observatory has been designed around the total field sensor. The reliability of the principal components of the network has been investigated and changes proposed for the remote observatories. (Author)