Sentence examples similar to repeated stations from inspiring English sources

Apart from the observatory data, the field survey repeat station data do not form part of the data set on which these global field models are based and therefore can be regarded as an independent test of these field models over an area like Southern Africa which is well known for its rapid change of the geomagnetic field.

If there has been no message in the TR phase, and AP has no data or message to send, the TR phase is repeated with stations starting to count backoff slots after a RIFS again.

The big black dots are geomagnetic repeat stations.

The repeat stations thus provide approximately annually spaced values for quiet night times.

All the repeat stations are marked by concrete beacons, ensuring that all observation points are exactly reoccupied during surveys.

Annual secular variation values for the repeat stations were obtained as first differences between 2014 and 2015 main field data divided by the time interval in years.

In the process, 120 vector differences from 40 repeat stations and 12 vector differences from the 4 observatories could be obtained for 2015.

The ground data coverage is improved compared to global models by using data from 38 repeat stations distributed through South Africa, Namibia and Botswana.

All the repeat stations are marked by concrete beacons, ensuring that all observation points are exactly reoccupied during successive surveys (Newitt et al. 1996; Barraclough and De Santis 2011).

Fig. 1 A map of southern Africa showing the positions of the four INTERMAGNET observatories, HER, HBK, KMH and TSU (red stars), as well as the positions of the repeat stations (blue stars) (i) Annual main field data: The repeat station measurements were obtained between the middle of September and middle of December each year.

These repeat stations have been occupied since 2005 on an annual basis in order to characterise the secular variation in Southern Africa more accurately in comparison with the previous practice of 5-year intervals.