[TowerTalk] Skip Distance

[jimlux]

On 9/13/19 6:47 AM, Roger D Johnson wrote:
> Frequency was 1825 kHz

Daytime? at 2MHz?

You're totally below the critical frequency, even with no sunspots..
No question you are getting skywave propagation. In fact, low sunspots

helps, because the D-layer absorption is lower, so you can actually get 
up to the F layer and back down.


Here's a real timeionogram from Wallops (somewhat farther south)
https://www.ngdc.noaa.gov/stp/IONO/rt-iono/latest/WI937.png
https://www.ngdc.noaa.gov/stp/IONO/rt-iono/latest/WP937.png

As I write this the MUF is about 6 MHz, so your 2MHz skywave is no problem.



I think there's some ionosondes farther north - there's one at Haystack 
near Boston, MA, but I can't seem to find the real time data.



> 
> On 9/13/2019 9:08 AM, jimlux wrote:
>> On 9/13/19 3:11 AM, Roger D Johnson wrote:
>>> These test were in late morning to early afternoon.
>> At what frequency - I think we can assume the SSN is low, low, low..
>>
>>>
>>> 73, Roger
>>>
>>> On 9/12/2019 9:02 PM, Roger D Johnson wrote:
>>>> I've been running some tests on my 8 circle array with K1JB. Joe is 
>>>> 17 miles away and I sometimes notice deep fading on his signal. 
>>>> Makes plotting the
>>>> antenna pattern very difficult. Is it possible to have skywave 
>>>> contamination
>>>> at this short range?
>>>>
>>>> 73, Roger
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