INDIGO : better geomagnetic observatories where we need them

The INDIGO project aims to improve the global coverage of digital observatories by deploying digital magnetometer systems in: i) Observatories where existing analog recording equipment is in need of upgrading. ii) Newly established digital observatories. iii) Existing digital observatories for the purpose of quality control and redundancy. In implementing the project and selecting suitable sites, special attention is paid to parts of the Earth devoid of magnetic observatories, increasing the reliability and long-term operation of existing observatories and cost-effective use of local resources. The Poster reviews the current status of the project. We examine the different steps and initiatives taken since the initiation of INDIGO in 2004 and assess their effectiveness in achieving progress towards our aims of improving global coverage and enhanced data quality

Influence of magnetic field variations on measurements by magnetometers using averaging algorithms

The article is devoted to features of modulus magnetic field measurements by means of proton magnetometers. Inertial characteristics of the magnetometers and dynamic errors of variable magnetic field measurements are discussed. Three basic magnetometers averaging algorithms, processing zero crossing times of free precession, are compared. Theoretical and some numerical estimations of the algorithms work are presented for the linear, square and harmonic variations of magnetic field. Key words: Proton magnetometer, data processing, absolute measurements. 1. Methodical Problems of Variations Measure-ment by Means of Inertial Device The magnetic field variation is continuous function of time. However in practical manner a magnetic field mea-suring device always has an action time (Ripka, 2001). The magnetometer can not operate instantly. Short as the mea-surement time will be it is not zero. So a value measured by inertial device is some averaging during a measurement time (Rasson, 1978). There is no problem when magneti

Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix J: Historical-Archeological Impact Study

The report assessing cultural resources for the Dickey/Lincoln School Transmission Project consists of five narrative chapters, a topical bibliography, and five appendices. The scope of work, together with the USDI guidelines for cultural resource survey (included in Appendix E), comprise an attitude and approach toward prehistory which is in accord with the current state of the art, not simply in terms of cultural resource management but also in terms of contemporary standards generally recognized by practitioners of anthropological archaeology