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hf:solar-terrestrial-data [2025/04/04 20:16] – Fix link syntax 2e0itbhf:solar-terrestrial-data [2025/04/08 22:19] (current) – ei5iyb
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 From time to time you might come across an image like this, like those published at [[http://www.n0nbh.com|n0nbh.com]]. From time to time you might come across an image like this, like those published at [[http://www.n0nbh.com|n0nbh.com]].
  
-{{:hf:solar101vhf.png|}}+ 
 +[[https://www.hamqsl.com/solar.html|{{https://www.hamqsl.com/solar101vhf.php?muf=athns&.gif?|Click to add Solar-Terrestrial Data to your website!}}]] 
  
 This is solar-terrestrial data. Solar-terrestrial charts are used to evaluate radio propagation conditions. This is solar-terrestrial data. Solar-terrestrial charts are used to evaluate radio propagation conditions.
  
-Here is a bit of a guide on how to interpret them.+**TL;DR** [[hf:solar-terrestrial-data#quick_interpretation_tips|Quick Interpretation Tips]] 
 + 
 +Here is a bit longer guide on how to interpret them. 
 + 
 +  
 + 
  
 ===== Date and Time ===== ===== Date and Time =====
  
-**Example:** '''04 Apr 2025 1800 GMT'''+**Example:** ''04 Apr 2025 1800 GMT''
  
 This is the timestamp of the data in UTC (GMT). Data is typically refreshed every few hours. This is the timestamp of the data in UTC (GMT). Data is typically refreshed every few hours.
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 | 12m–10m | Fair | Poor | | 12m–10m | Fair | Poor |
  
-* '''Fair''': Usable but not ideal +  * ''Fair'': Usable but not ideal 
-* '''Poor''': Weak or unreliable propagation+  * ''Poor'': Weak or unreliable propagation
  
 ===== Geophysical Environment ===== ===== Geophysical Environment =====
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 Visual indicator of Maximum Usable Frequency (MUF) across regions. Visual indicator of Maximum Usable Frequency (MUF) across regions.
  
-* Blue: <6 MHz — poor +  * Blue: <6 MHz — poor 
-* Yellow/Orange: 8–16 MHz — moderate +  * Yellow/Orange: 8–16 MHz — moderate 
-* Red: >18 MHz — good+  * Red: >18 MHz — good
  
 ===== Quick Interpretation Tips ===== ===== Quick Interpretation Tips =====
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 ==== What Is a "Good" SN for Radio Operators? ==== ==== What Is a "Good" SN for Radio Operators? ====
  
-  * '''SN > 50''' → HF band openings become more consistent. +  * ''SN > 50'' → HF band openings become more consistent. 
-  * '''SN > 100''' → Excellent upper HF band propagation (15m, 12m, 10m). +  * ''SN > 100'' → Excellent upper HF band propagation (15m, 12m, 10m). 
-  * '''SN < 30''' → Poor or unreliable conditions on high HF bands.+  * ''SN < 30'' → Poor or unreliable conditions on high HF bands.
  
 ---- ----
  
-''SN values are monitored by observatories like NOAA and SIDC. Regular updates available at [[https://www.swpc.noaa.gov/|NOAA Space Weather Prediction Center]].''+SN values are monitored by observatories like NOAA and SIDC. Regular updates available at [[https://www.swpc.noaa.gov/|NOAA Space Weather Prediction Center]].
  
hf/solar-terrestrial-data.1743797796.txt.gz · Last modified: 2025/04/04 20:16 by 2e0itb