RSSGB2RS Propagation News

Propagation News – 6 May 2018

| May 4, 2018

The sun remained spotless last week and the latest projections place sunspot minimum sometime around mid-2019. NOAA’s Space Weather Prediction Center says solar cycle 24 is declining more quickly than originally forecast, but expect the current solar conditions to last for at least another 12 to 18 months. On the bright side, quieter geomagnetic conditions […]

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Propagation News – 29 April 2018

| April 27, 2018

Last weekend’s poor HF conditions, which made for a quieter than normal International Marconi Day on the 21st, were largely caused by incoming material from a large solar coronal hole. A lack of sunspots didn’t help either. The incoming solar wind pushed the K-index up to six at one point, but conditions settled as the […]

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Propagation News – 22 April 2018

| April 20, 2018

The Sun remained spotless this week, other than the hint of a new sunspot coming around its limb as this report was being written. The solar flux index reflected this, sitting around the high 60s, although it did reach 71 on Thursday morning. Geomagnetic conditions were quiet at the beginning of the week, but a […]

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Propagation News – 15 April 2018

| April 13, 2018

The predicted unsettled geomagnetic conditions arrived on Tuesday and continued with the K-index hitting five on Wednesday. This was due an elongated coronal hole on the Sun, with the escaping plasma causing the solar wind to pick up in both speed and density. The wind peaked at more than 550 kilometres per second and widespread […]

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Propagation News – 8 April 2018

| April 6, 2018

Last week saw a continued lack of sunspots as we journey towards solar minimum sometime in 2019–2020. The solar flux index hovered around 68-69, which is only about two to three points above what we can expect when it hits its lowest point. Unfortunately, we are likely to be repeating this sentence quite a lot […]

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Propagation News – 1 April 2018

| March 29, 2018

As we move into April 2018 it is time to think about updating the latest smoothed sunspot number if you are using a VOACAP-based propagation prediction program. There are a number of different methods used to smooth or average sunspot numbers, but VOACAP recommends the adjusted SSN from the Solar Influences Data Centre in Belgium. […]

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