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Thursday, June 9, 2016

FCC Providing AM Daytime Contour Maps

Not sure it's been mentioned on the forums before, but the FCC's AM broadcast query now includes links showing a daytime groundwave contour map for each station in the database. These, super-imposed over either a Bing-based map or USGS map or Google Earth. Links for pure KML coordinates are also provided for those wanting to map their own.

Only daytime groundwave contours are provided, out to the 2.0 mV/m and 0.5 mV/m contours.

Go to the AM Query page:

https://www.fcc.gov/media/radio/am-query

Type in a call sign, like KFI (640 KHz, Los Angeles), hit enter, and on the next page shown, click on the station call sign of interest.

The facility record of KFI:

https://transition.fcc.gov/fcc-bin/amq?list=0&facid=34425

Look for the following links at the bottom of the daytime record:

Maps:
      Daytime Groundwave 0.5 mV/m Service (and 2.0 mV/m) contours on Bing map
      Daytime Groundwave 0.5 mV/m Service (and 2.0 mV/m) contours on Open Street or USGS Maps
      KML / Google Earth (0.5 mV/m Daytime Groundwave Service and 2.0 mV/m contours)
      Text file for KML-capable browsers

Click on one of the map links and a contour map will be shown.

This is a nice innovation by the FCC. Hopefully, skywave plots will be implemented next.

FCC's contour map for KFI-640

Monday, April 25, 2016

What's On The Mediumwaves (Daytime)

Here are some interesting statistics compiled today using the FCC database 04-25-2016. All data are for US licensed stations in the DAYTIME and UNLIMITED services. Stations outside the continental US (Hawaii, Alaska, Puerto Rico, etc.) are also included.

DAYTIME AND UNLIMITED STATION DETAILS REPORT

Separate facilities: 4,672 (includes SILENT facilities)

Notes:

(U) = UNLIMITED
(D) = DAYTIME

=====================================

(CL) Current, License records: 4,672

UNLIMITED: 781
DAYTIME: 3,891

IBOC UNLIMITED: 53 registered
IBOC DAYTIME: 187 registered

Class A: 73
Class B: 1,747
Class C: 997
Class D: 1,855

W-Call Signs: 2,784
K-Call Signs: 1,888

Services above band center (1115 KHz): 3,128
Services below band center (1115 KHz): 1,544

East of St. Louis, MO: 2,711
West of St. Louis, MO: 1,961

Quadrant 1 (NE) from St. Louis, MO: 1,169
Quadrant 2 (SE) from St. Louis, MO: 1,542
Quadrant 3 (SW) from St. Louis, MO: 1,007
Quadrant 4 (NW) from St. Louis, MO: 954

Combined power (watts): 27,924,750

Total towers: 7,054

Tallest tower: 951 feet (290 meters) (D)WKY-930.000 (0.899 wavelength)
Shortest tower: 50 feet (15 meters) (D)KJNT-1490.000 (0.076 wavelength)

Towers taller than 225° (0.625 wavelength or 5/8 wave): 42 (D)WGKA-920.000 (D)WKY-930.000 (U)KDKA-1020.000 (D)WHO-1040.000 (D)KMTA-1050.000 (D)WZOT-1220.000 (D)KWIX-1230.000 (U)WBVP-1230.000 (D)WJOI-1230.000 (D)KTAM-1240.000 (D)WGVM-1260.000 (D)WIJD-1270.000 (D)WKLJ-1290.000 (D)KTCK-1310.000 (D)WAGF-1320.000 (U)KDTD-1340.000 (U)KSEK-1340.000 (D)KRMD-1340.000 (U)WXKX-1340.000 (D)WLOU-1350.000 (D)KMJM-1360.000 (D)WSTC-1400.000 (U)KMNV-1400.000 (D)KKLO-1410.000 (D)WAOC-1420.000 (D)WPRS-1440.000 (D)KKXL-1440.000 (D)WMBD-1470.000 (U)WSIP-1490.000 (U)WOMI-1490.000 (U)WKLQ-1490.000 (D)KSTP-1500.000 (D)WLGN-1510.000 (D)KOLM-1520.000 (D)KFBK-1530.000 (D)WJZI-1540.000 (D)WSLA-1560.000 (D)WTAY-1570.000 (D)WBGZ-1570.000 (D)WFUR-1570.000 (D)WBCP-1580.000 (D)KTIQ-1660.000

Towers shorter than 36° (0.100 wavelength or 1/10 wave): 6 (D)KAPS-660.000 (D)KCFM-1250.000 (D)WKCY-1300.000 (D)KFJL-1400.000 (D)KBZY-1490.000 (D)KJNT-1490.000

Towers taller than 750ft: 5 (D)WNAX-570.000 (D)KMJ-580.000 (U)WSM-650.000 (D)WKY-930.000 (D)WHO-1040.000

Towers shorter than 75ft: 11 (D)KCFM-1250.000 (D)WKCY-1300.000 (D)KFJL-1400.000 (D)WZBR-1410.000 (D)WLUX-1450.000 (D)WIRB-1490.000 (D)KLZN-1490.000 (D)KBZY-1490.000 (D)KJNT-1490.000 (D)KVOG-1530.000 (D)WPDC-1600.000

Total of all tower heights: 1,748,752 feet (533,020 meters)

Greatest tower spacing with respect to array reference point: 2,246 feet (685 meters) (D)KNFL-730.000 (1.667 wavelength)
Closest tower spacing with respect to array reference point: 10 feet (3 meters) (D)WBRD-1420.000 (0.014 wavelength)

Tower type 1 count: 6,555 normal mast
Tower type 2 count: 489 top loaded
Tower type 3 count: 4 sectionalized, top loaded (U)KNBR-680.000 (U)KDKA-1020.000 (D)WHO-1040.000 (D)WOC-1420.000
Tower type 4 count: 6 sectionalized, not top loaded (D)WKY-930.000 (D)KTTO-970.000 (D)WROK-1440.000 (D)KSTP-1500.000 (D)KFBK-1530.000

Omni-directional arrays (single tower): 3,474
Directional arrays (multi-tower): 1,198

Highest RMSTheoretical mV/m (published) at 1 km: 3545.89 (D)KFBK-1530.000
Lowest RMSTheoretical mV/m (published) at 1 km: 140.82 (D)WCTA-810.000

Single tower lowest gain in dB (calculated): -3.743 (D)WSEV-930.000 (rms standard)
Single tower lowest mV/m at 1 km (calculated): 133.805 (D)KOBO-1450.000 (rms standard)
Single tower highest gain in dB (calculated): 4.899 (D)KSTP-1500.000 (rms standard)
Single tower highest mV/m at 1 km (calculated): 3800.424 (D)KSTP-1500.000 (rms standard)

Multi-tower deepest array notch in dB (calculated): -30.534 (U)WKGE-850.000 (rms standard)
Multi-tower deepest array notch in mV/m at 1 km (calculated): 10.5 (D)WAKY-620.000 (rms standard)
Multi tower highest array gain in dB (calculated): 11.988 (D)KGOW-1560.000 (rms standard)
Multi tower highest array mV/m at 1 km (calculated): 8244.295 (D)KGOW-1560.000 (rms standard)

What's On The Mediumwaves (Nighttime)

Here are some interesting statistics compiled today using the FCC database 04-25-2016. All data are for US licensed stations in the NIGHTTIME and UNLIMITED services. Stations outside the continental US (Hawaii, Alaska, Puerto Rico, etc.) are also included.

NIGHTTIME AND UNLIMITED STATION DETAILS REPORT

Separate facilities: 4,106 (includes SILENT facilities)

Notes:

   (U) = UNLIMITED
   (N) = NIGHTTIME

=====================================

(CL) Current, License records: 4,106

UNLIMITED: 781
NIGHTTIME: 3,325

IBOC UNLIMITED: 53 registered
IBOC NIGHTTIME: 181 registered

Class A: 73
Class B: 1,746
Class C: 996
Class D: 1,291

W-Call Signs: 2,350
K-Call Signs: 1,756

Services above band center (1115 KHz): 2,818
Services below band center (1115 KHz): 1,288

East of St. Louis, MO: 2,282
West of St. Louis, MO: 1,824

Quadrant 1 (NE) from St. Louis, MO: 1,015
Quadrant 2 (SE) from St. Louis, MO: 1,267
Quadrant 3 (SW) from St. Louis, MO: 921
Quadrant 4 (NW) from St. Louis, MO: 903

Combined power (watts): 10,898,247

Total towers: 7,761

Tallest tower: 992 feet (302 meters) (N)WRDT-560.000 (0.565 wavelength)
Shortest tower: 32 feet (10 meters) (N)WSIV-1540.000 (0.050 wavelength)

Towers taller than 225° (0.625 wavelength or 5/8 wave): 36 (N)WGKA-920.000 (N)WKY-930.000 (U)KDKA-1020.000 (N)WHO-1040.000 (N)KMTA-1050.000 (N)WZOT-1220.000 (N)KWIX-1230.000 (U)WBVP-1230.000 (N)WJOI-1230.000 (N)KTAM-1240.000 (N)WGVM-1260.000 (N)WIJD-1270.000 (N)WKLJ-1290.000 (N)KTCK-1310.000 (N)WAGF-1320.000 (U)KDTD-1340.000 (U)KSEK-1340.000 (N)KRMD-1340.000 (U)WXKX-1340.000 (N)WLOU-1350.000 (N)KMJM-1360.000 (N)WSTC-1400.000 (U)KMNV-1400.000 (N)KKLO-1410.000 (N)WAOC-1420.000 (N)WPRS-1440.000 (N)KKXL-1440.000 (N)WMBD-1470.000 (U)WSIP-1490.000 (U)WOMI-1490.000 (U)WKLQ-1490.000 (N)KFBK-1530.000 (N)WBGZ-1570.000 (N)WFUR-1570.000 (N)WBCP-1580.000 (N)KTIQ-1660.000

Towers shorter than 36° (0.100 wavelength or 1/10 wave): 7 (N)KAPS-660.000 (N)KCFM-1250.000 (N)WKCY-1300.000 (N)KFJL-1400.000 (N)KBZY-1490.000 (N)KJNT-1490.000 (N)WSIV-1540.000

Towers taller than 750ft: 6 (N)WRDT-560.000 (N)WNAX-570.000 (N)KMJ-580.000 (U)WSM-650.000 (N)WKY-930.000 (N)WHO-1040.000

Towers shorter than 75ft: 12 (N)KCFM-1250.000 (N)WKCY-1300.000 (N)KFJL-1400.000 (N)WZBR-1410.000 (N)WLUX-1450.000 (N)WIRB-1490.000 (N)KLZN-1490.000 (N)KBZY-1490.000 (N)KJNT-1490.000 (N)KVOG-1530.000 (N)WSIV-1540.000 (N)WPDC-1600.000

Total of all tower heights: 1,943,521 feet (592,385 meters)

Greatest tower spacing with respect to array reference point: 2,663 feet (812 meters) (N)KBOW-550.000 (1.489 wavelength)
Closest tower spacing with respect to array reference point: 10 feet (3 meters) (N)WBRD-1420.000 (0.014 wavelength)

Tower type 1 count: 7,230 normal mast
Tower type 2 count: 522 top loaded
Tower type 3 count: 4 sectionalized, top loaded (U)KNBR-680.000 (U)KDKA-1020.000 (N)WHO-1040.000 (N)WOC-1420.000
Tower type 4 count: 5 sectionalized, not top loaded (N)KBIF-900.000 (N)WKY-930.000 (N)WROK-1440.000 (N)KFBK-1530.000

Omni-directional arrays (single tower): 2,471
Directional arrays (multi-tower): 1,635

Highest RMSTheoretical mV/m (published) at 1 km: 3126.79 (N)KFBK-1530.000
Lowest RMSTheoretical mV/m (published) at 1 km: 9.75 (N)KLEY-1130.000

Single tower lowest gain in dB (calculated): -14.71 (N)WDOC-1310.000 (rms standard)
Single tower lowest mV/m at 1 km (calculated): 8.889 (N)WDOC-1310.000 (rms standard)
Single tower highest gain in dB (calculated): 4.188 (N)WHO-1040.000 (rms standard)
Single tower highest mV/m at 1 km (calculated): 3501.793 (N)WHO-1040.000 (rms standard)

Multi-tower deepest array notch in dB (calculated): -39.835 (N)WAQI-710.000 (rms standard)
Multi-tower deepest array notch in mV/m at 1 km (calculated): 0.585 (N)WWSJ-1580.000 (rms standard)
Multi tower highest array gain in dB (calculated): 12.717 (N)KNTH-1070.000 (rms standard)
Multi tower highest array mV/m at 1 km (calculated): 7592.594 (N)WWJ-950.000 (rms standard)

What's On The Mediumwaves (Critical Hours)

Here are some interesting statistics compiled today using the FCC database 04-25-2016. All data are for US licensed stations in the CRITICAL HOURS  services. Stations outside the continental US (Hawaii, Alaska, Puerto Rico, etc.) are also included.

CRITICAL HOURS STATION DETAILS REPORT

Separate facilities: 196 (includes SILENT facilities)

Notes:

   (C) = CRITICAL HOURS

=====================================

(CL) Current, License records: 196

CRITICAL HOURS: 196

IBOC CRITICAL HOURS: 4 registered

Class A: 1
Class B: 24
Class C: 0
Class D: 171

W-Call Signs: 151
K-Call Signs: 45

Services above band center (1115 KHz): 116
Services below band center (1115 KHz): 80

East of St. Louis, MO: 150
West of St. Louis, MO: 46

Quadrant 1 (NE) from St. Louis, MO: 60
Quadrant 2 (SE) from St. Louis, MO: 90
Quadrant 3 (SW) from St. Louis, MO: 19
Quadrant 4 (NW) from St. Louis, MO: 27

Combined power (watts): 1,074,592

Total towers: 290

Tallest tower: 683 feet (208 meters) (C)WOAY-860.000 (0.597 wavelength)
Shortest tower: 97 feet (30 meters) (C)WNVR-1030.000 (0.102 wavelength)

Towers taller than 225° (0.625 wavelength or 5/8 wave): 1 (C)WLGN-1510.000

Towers shorter than 36° (0.100 wavelength or 1/10 wave): 0

Towers taller than 750ft: 0

Towers shorter than 75ft: 0

Total of all tower heights: 64,844 feet (19,764 meters)

Greatest tower spacing with respect to array reference point: 1,068 feet (325 meters) (C)KVOX-740.000 (0.803 wavelength)
Closest tower spacing with respect to array reference point: 102 feet (31 meters) (C)WCHE-1520.000 (0.158 wavelength)

Tower type 1 count: 263 normal mast
Tower type 2 count: 27 top loaded
Tower type 3 count: 0 sectionalized, top loaded
Tower type 4 count: 0 sectionalized, not top loaded

Omni-directional arrays (single tower): 147
Directional arrays (multi-tower): 49

Highest RMSTheoretical mV/m (published) at 1 km: 2875.09 (C)WMEX-1510.000
Lowest RMSTheoretical mV/m (published) at 1 km: 144.84 (C)WASN-1500.000

Single tower lowest gain in dB (calculated): -0.998 (C)KKLL-1100.000 (rms standard)
Single tower lowest mV/m at 1 km (calculated): 148.422 (C)WKIK-1560.000 (rms standard)
Single tower highest gain in dB (calculated): 3.118 (C)WLBA-1130.000 (rms standard)
Single tower highest mV/m at 1 km (calculated): 2234.218 (C)WTZA-1010.000 (rms standard)

Multi-tower deepest array notch in dB (calculated): -29.266 (C)KGBT-1530.000 (rms standard)
Multi-tower deepest array notch in mV/m at 1 km (calculated): 10.507 (C)WRYT-1080.000 (rms standard)
Multi tower highest array gain in dB (calculated): 9.471 (C)KFXZ-1520.000 (rms standard)
Multi tower highest array mV/m at 1 km (calculated): 5106.254 (C)KVTT-1110.000 (rms standard)