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Speg's 2011 Broadcast FM DX Log


             2011 Es
Days:                   4
Es Contacts:           24
 Different Stations:   24
 New Stations:         10
States:                 4 (CA FL NV PA)
Canadian Provinces:     0 
Mexican States:         7 (BC CH CO DG MI SI YU) +DF
 New Mexican States:              3 (CH DG SI)
Countries:              2 (US MX)


June 29, 2011 (Es) from Norman OK 
Est. Critical Freq: 18.88 MHz.    Est. Electron Density: 4.42 x 1012 /m3 (based on kzxy)


 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 94.1  kmxb     228 pm  986    nv henderson             HOT AC         MIX 94.1. LOCAL VEGAS AREA ADS
 94.3  kduc     217 pm 1106    ca barstow               TOP 40-RHY     THE DUCK
102.3  kzxy-fm  211 pm 1119    ca apple valley          HOT AC         Y-102

June 22, 2011 (Es) from Norman OK 
Est. Critical Freq: 25.91 MHz.    Est. Electron Density: 8.32 x 1012 /m3 (based on xhclo)


 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 88.5  xedi    1258 pm  681 mx CH CHIHUAHUA             SPAN-TOP 40    
 89.7  xeope    100 pm  990 mx si mazatlan              SPAN-TOP 40    EXA FM
 92.9  wikx    1252 pm 1065    fl charlotte harbor      COUNTRY        KIX 92.9
 92.9  XHYUC    129 pm 1093 mx yu merida                SPANISH        RDS: XHYUC
 93.1  kplv     535 pm 1014    nv las vegas             RHYTH AC       THE PARTY
 93.7  wtlt    1254 pm 1101    FL sanibel island        SOFT AC        LITE 93.7
 94.1  wqkx     156 pm  608    pa sunbury               top 40         LOCAL ADS
 94.3  KOKO-fm  356 pm 1267    ca kerman                RHYTH OLD 
 95.5  xhmp     103 pm  758 mx co TORREON               SPANISH
 95.7  xhck     122 pm  887 mx dg durango               SPANISH        RDS: maspopfm
 99.5  wail     110 pm 1197    fl key west              CLSC ROCK      SUN 103.1 AND 99.5
 99.5  xhsbt    152 pm  692 mx CH san buenaventura      SPANISH        
 99.9  XHCTC    111 pm  726 mx ch cd. cuauhtemoc        SPANISH        RDS: XHCTC
101.3  XHMSL    114 pm  946 mx si los mochis            SPANISH        RDS: XHMSL
103.3  xenw    1248 pm  965 mx SI CULIACAN              SPANISH        RDS: MAXIMA 103.3 FM DESDE DE CULIACAN SINALOA
106.9  xhada    116 pm 1126 mx bc ENSENADA              SPANISH
107.1  xhclo   1251 pm  622 mx co monclova              SPANISH        LA CALIENTE

June 10, 2011 (Es) from Norman OK 
Est. Critical Freq: 17.66 MHz.    Est. Electron Density: 3.87 x 1012 /m3 (based on xhsh)


 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 91.5  xhmrl   1124 pm 1100 mx mi Morelia               SPANISH        WEBCAST MATCH
 93.9  xhmo    1122 pm 1100 mx mi Morelia               SPANISH        WEBCAST MATCH
 95.3  xhsh    1058 pm 1100 mx df Ciudad de Mexico      SPANISH        RDS: AMOR. WEBCAST MATCH

June 5, 2011 (Es) from Norman OK 
Est. Critical Freq: 17.75 MHz.    Est. Electron Density: 3.91 x 1012 /m3 


 FREQ  CALL      Time  Dist    ST City                  Format         Other information

 92.9  wmfq     525 pm  991    FL Ocala                                



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).