Speg's 2016 Broadcast FM DX Log

Capitalized items are what were heard on the air to identify the station. Distances are in miles.
Red call letters indicate new stations. Tan call letters indicate new stations this year.
Explanation about estimation of critical frequency and electron density is at bottom of page.
Unidentified or unconfirmed list

             2016 Es
Days:                   2
Es Contacts:            6
 Different Stations:    6
 New Stations:          1
States:                 4 (AL FL GA MI)
Canadian Provinces:     0
Mexican States:         0
Countries:              1 (US)

July 12, 2016 (Es) from Norman OK 
Est. Critical Freq: 20.59 MHz.    Est. Electron Density: 5.26 x 10¹² /m³ (based on wtvy-fm)


 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 94.3  wizb    1028 am  748    al abbeville             REL-CCM        JOY-FM. STREAM MATCH. AGAIN AT 1050 am
 94.3  wnfb    1047 am  918    FL lake city             AC             MIX 94.3, NORTH FLORIDA'S BEST VARIETY
 95.3  WVKV    1025 am  860    ga nashville             REL-CCM        RDS
 95.5  WTVY-fm 1019 am  755    al dothan                COUNTRY        RDS
 96.7  wgov-fm 1018 am  870    ga valdosta              URBAN          96-7.


June 13, 2016 (Es) from Norman OK 
Est. Critical Freq: 17.86 MHz.    Est. Electron Density: 3.96 x 10¹² /m³
Brief evening Es after missing a much bigger opening while I was at work

 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 93.9  WNBY     559 pm 1004    mi newberry              OLDIES 93. WEB STREAM MATCH

The critical frequency and electron density of the sporadic-E layer are estimated by calculating the minimum values to allow the reflection of the radio waves from the station requiring the highest critical frequency of the broadcast frequencies and distances observed. The following assumptions are used: (1) The height of the Es layer is 105 km, and (2) constant (no tilt), and that (3) the signal is affected only by the Es layer and not the temperature profile or weather in the elevations below the Es layer. Given otherwise similar parameters, the signal needing the highest critical frequency and electron density of the Es layer are those of shorter reflection distances or higher broadcast frequencies. The values listed were derived mathematically, but the 105 km height was used to compare values to the PROPLAB-PRO radio propagation computer program (which agreed reasonably well).