[Lowfer] W7IUV in EN90xn

[Larry Molitor]

Interesting comparisons. I don't know about Ward's power estimate but I'm pretty sure mine is very optimistic. Given that, I can't explain the observed S/N difference.



      From: Michael Sapp <wa3tts at verizon.net>
 To: lowfer at mailman.qth.net 
 Sent: Tuesday, March 6, 2018 8:55 AM
 Subject: [Lowfer] W7IUV in EN90xn
   
Larry & All:  Similar total captures and SNRs  to prior session, but the time window of signal acquisition and loss moved up about 2 hours....

12 spots:

      Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az 
      2018-03-06 09:02  W7IUV  0.137451  -25  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 09:06  W7IUV  0.137451  -25  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 07:30  W7IUV  0.137451  -25  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 08:26  W7IUV  0.137451  -26  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 08:02  W7IUV  0.137451  -26  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 09:18  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 08:14  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 08:10  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 08:06  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 07:58  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 07:50  W7IUV  0.137451  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89  
      2018-03-06 07:38  W7IUV  0.137452  -27  0  DN07dg  0.2  WA3TTS/2  EN90xn  3227  89 



  Best SNRs were received from WH2XXP in approximately the same time period....


      2018-03-06 08:44  WH2XXP  0.137506  -13  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:24  WH2XXP  0.137506  -14  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:56  WH2XXP  0.137506  -15  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:48  WH2XXP  0.137506  -15  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:20  WH2XXP  0.137506  -15  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:16  WH2XXP  0.137506  -15  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:40  WH2XXP  0.137506  -16  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:52  WH2XXP  0.137506  -16  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:32  WH2XXP  0.137506  -16  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:36  WH2XXP  0.137506  -17  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 08:28  WH2XXP  0.137506  -17  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:36  WH2XXP  0.137506  -17  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 07:28  WH2XXP  0.137506  -17  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 06:44  WH2XXP  0.137506  -17  0  DM33  5  WA3TTS/2  EN90xn  3014  65  
      2018-03-06 10:20  WH2XXP  0.137507  -18  0  DM33  5  WA3TTS/2  EN90xn  3014  65  



  There is only about 1/2 dB in 20Log(D) between the two stations for the distance portion of the free space path loss equation. And my NW EWE may favor the W7IUV direction by 1/2 to 1 dB at most. given the broad front lobe of the cardio pattern.  That being the case, with this limited data set, there is a chance of W7IUV EIRP being 8~10 db down from XXP's EIRP...

 Given that XXP reached audible -13 SNR overnight, I would say that propagation conditions were reasonably good as that is not a nightly occurrence for me.  No T/As from the East Coast stations were noted however, which is also a sign of propagation enhancement.  The next challenge is for me to receive both W7IUV and 2E0ILY in one overnight session...

73, Mike wa3tts

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