GB2RS Propagation News
Propagation News – 8 March 2015
Last week saw the solar flux index remain in the range 123-130. The beginning of the week saw rather unsettled geomagnetic conditions, with the planetary A index up to 23 at middle latitudes. Solar wind speeds remained elevated above 500km/s due to a geomagnetic storm that brought widespread aurora around the arctic circle. The solar […]
Propagation News – 1 March 2015
We are now into March with the spring equinox just a few weeks away. With equal illumination on both hemispheres, this is traditionally a good time for north-south contacts on HF, such as UK to South Africa and South America. A detailed analysis using VOACAP online shows a few more factors to consider when planning […]
Propagation News – 22 February 2015
While the solar flux index declined to the 120s this week, geomagnetic conditions became quite unsettled. The Kp index reached five around 18th February, spawning an aurora that was visible from northern parts of the UK. This didn’t help HF conditions, which had been sparkling recently due to a long period of quiet conditions. For […]
Propagation News – 15 February 2015
This week the solar flux index declined slightly to be in the 130s, pretty much as predicted by NOAA. The observed sunspot number for the week also declined, being 76 on Thursday 12 February. Geomagnetic conditions were largely settled, with the A index keeping below 15 all week. For next week, NOAA predicts more of […]
Propagation News – 8 February 2015
As reported last week, the 2015 K1N DXpedition to Navassa Island in the Caribbean is now under way. If you would like to revisit the HF propagation predictions for the DXpedition, refer to last week’s GB2RS propagation entry. K1N has been audible on most bands and possibly loudest on 12m in the afternoon. And now […]
Propagation News – 1 February 2015
The 2015 K1N DXpedition to Navassa Island in the Caribbean is due to start shortly. Navassa is just west of Haiti and is a 4,600 mile sea path from the UK, beaming 270 degrees. Let’s look at the propagation. On 160m, that’s 1.8MHz, and 80m, 3.5MHz, you will need a mutual dark path between you […]
