Londonderry - Ofcom TX Visualiser

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Londonderry

Londonderry · BBC Radio Ulster/Foyle (FM) · 93.1 MHz

Antenna pattern

In-use horizontal pattern

ERP field: In-UseERP/HP = 15.6 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 18.5 dB attenuation; relative ERP 1.4% of peak 10°: 16.6 dB attenuation; relative ERP 2.2% of peak 20°: 13.5 dB attenuation; relative ERP 4.5% of peak 30°: 10.4 dB attenuation; relative ERP 9.1% of peak 40°: 6.6 dB attenuation; relative ERP 21.9% of peak 50°: 4.1 dB attenuation; relative ERP 38.9% of peak 60°: 2.2 dB attenuation; relative ERP 60.3% of peak 70°: 1.2 dB attenuation; relative ERP 75.9% of peak 80°: 0.3 dB attenuation; relative ERP 93.3% of peak 90°: 0 dB attenuation; relative ERP 100% of peak 100°: 0.3 dB attenuation; relative ERP 93.3% of peak 110°: 0.8 dB attenuation; relative ERP 83.2% of peak 120°: 0.8 dB attenuation; relative ERP 83.2% of peak 130°: 0.3 dB attenuation; relative ERP 93.3% of peak 140°: 0.1 dB attenuation; relative ERP 97.7% of peak 150°: 1.1 dB attenuation; relative ERP 77.6% of peak 160°: 1 dB attenuation; relative ERP 79.4% of peak 170°: 0.5 dB attenuation; relative ERP 89.1% of peak 180°: 0.1 dB attenuation; relative ERP 97.7% of peak 190°: 0.2 dB attenuation; relative ERP 95.5% of peak 200°: 1 dB attenuation; relative ERP 79.4% of peak 210°: 2.1 dB attenuation; relative ERP 61.7% of peak 220°: 4.2 dB attenuation; relative ERP 38% of peak 230°: 6.8 dB attenuation; relative ERP 20.9% of peak 240°: 10 dB attenuation; relative ERP 10% of peak 250°: 14.4 dB attenuation; relative ERP 3.6% of peak 260°: 16.9 dB attenuation; relative ERP 2% of peak 270°: 18.9 dB attenuation; relative ERP 1.3% of peak 280°: 19.3 dB attenuation; relative ERP 1.2% of peak 290°: 19.9 dB attenuation; relative ERP 1% of peak 300°: 20 dB attenuation; relative ERP 1% of peak 310°: 19 dB attenuation; relative ERP 1.3% of peak 320°: 18.9 dB attenuation; relative ERP 1.3% of peak 330°: 19.2 dB attenuation; relative ERP 1.2% of peak 340°: 19.3 dB attenuation; relative ERP 1.2% of peak 350°: 19.1 dB attenuation; relative ERP 1.2% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 90° at 0 dB attenuation.

Deepest restriction(s): 300° at 20 dB attenuation.

In-use vertical pattern

ERP field: In-Use ERP/VP = 15.6 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 18.5 dB attenuation; relative ERP 1.4% of peak 10°: 16.6 dB attenuation; relative ERP 2.2% of peak 20°: 13.5 dB attenuation; relative ERP 4.5% of peak 30°: 10.4 dB attenuation; relative ERP 9.1% of peak 40°: 6.6 dB attenuation; relative ERP 21.9% of peak 50°: 4.1 dB attenuation; relative ERP 38.9% of peak 60°: 2.2 dB attenuation; relative ERP 60.3% of peak 70°: 1.2 dB attenuation; relative ERP 75.9% of peak 80°: 0.3 dB attenuation; relative ERP 93.3% of peak 90°: 0 dB attenuation; relative ERP 100% of peak 100°: 0.3 dB attenuation; relative ERP 93.3% of peak 110°: 0.8 dB attenuation; relative ERP 83.2% of peak 120°: 0.8 dB attenuation; relative ERP 83.2% of peak 130°: 0.3 dB attenuation; relative ERP 93.3% of peak 140°: 0.1 dB attenuation; relative ERP 97.7% of peak 150°: 1.1 dB attenuation; relative ERP 77.6% of peak 160°: 1 dB attenuation; relative ERP 79.4% of peak 170°: 0.5 dB attenuation; relative ERP 89.1% of peak 180°: 0.1 dB attenuation; relative ERP 97.7% of peak 190°: 0.2 dB attenuation; relative ERP 95.5% of peak 200°: 1 dB attenuation; relative ERP 79.4% of peak 210°: 2.1 dB attenuation; relative ERP 61.7% of peak 220°: 4.2 dB attenuation; relative ERP 38% of peak 230°: 6.8 dB attenuation; relative ERP 20.9% of peak 240°: 10 dB attenuation; relative ERP 10% of peak 250°: 14.4 dB attenuation; relative ERP 3.6% of peak 260°: 16.9 dB attenuation; relative ERP 2% of peak 270°: 18.9 dB attenuation; relative ERP 1.3% of peak 280°: 19.3 dB attenuation; relative ERP 1.2% of peak 290°: 19.9 dB attenuation; relative ERP 1% of peak 300°: 20 dB attenuation; relative ERP 1% of peak 310°: 19 dB attenuation; relative ERP 1.3% of peak 320°: 18.9 dB attenuation; relative ERP 1.3% of peak 330°: 19.2 dB attenuation; relative ERP 1.2% of peak 340°: 19.3 dB attenuation; relative ERP 1.2% of peak 350°: 19.1 dB attenuation; relative ERP 1.2% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 90° at 0 dB attenuation.

Deepest restriction(s): 300° at 20 dB attenuation.

Licensed horizontal pattern

ERP field: Licensed ERP/HP = 16 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 10 dB attenuation; relative ERP 10% of peak 10°: 10 dB attenuation; relative ERP 10% of peak 20°: 7 dB attenuation; relative ERP 20% of peak 30°: 7 dB attenuation; relative ERP 20% of peak 40°: 3 dB attenuation; relative ERP 50.1% of peak 50°: 3 dB attenuation; relative ERP 50.1% of peak 60°: 3 dB attenuation; relative ERP 50.1% of peak 70°: 3 dB attenuation; relative ERP 50.1% of peak 80°: 0 dB attenuation; relative ERP 100% of peak 90°: 0 dB attenuation; relative ERP 100% of peak 100°: 0 dB attenuation; relative ERP 100% of peak 110°: 0 dB attenuation; relative ERP 100% of peak 120°: 0 dB attenuation; relative ERP 100% of peak 130°: 0 dB attenuation; relative ERP 100% of peak 140°: 0 dB attenuation; relative ERP 100% of peak 150°: 0 dB attenuation; relative ERP 100% of peak 160°: 0 dB attenuation; relative ERP 100% of peak 170°: 0 dB attenuation; relative ERP 100% of peak 180°: 0 dB attenuation; relative ERP 100% of peak 190°: 0 dB attenuation; relative ERP 100% of peak 200°: 0 dB attenuation; relative ERP 100% of peak 210°: 0 dB attenuation; relative ERP 100% of peak 220°: 3 dB attenuation; relative ERP 50.1% of peak 230°: 3 dB attenuation; relative ERP 50.1% of peak 240°: 7 dB attenuation; relative ERP 20% of peak 250°: 7 dB attenuation; relative ERP 20% of peak 260°: 10 dB attenuation; relative ERP 10% of peak 270°: 10 dB attenuation; relative ERP 10% of peak 280°: 10 dB attenuation; relative ERP 10% of peak 290°: 10 dB attenuation; relative ERP 10% of peak 300°: 10 dB attenuation; relative ERP 10% of peak 310°: 10 dB attenuation; relative ERP 10% of peak 320°: 10 dB attenuation; relative ERP 10% of peak 330°: 10 dB attenuation; relative ERP 10% of peak 340°: 10 dB attenuation; relative ERP 10% of peak 350°: 10 dB attenuation; relative ERP 10% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, 190°, 200°, 210° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 260°, 270°, 280°, 290°, 300°, 310°, 320°, 330°, 340°, 350° at 10 dB attenuation.

Licensed vertical pattern

ERP field: Licensed ERP/VP = 16 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 10 dB attenuation; relative ERP 10% of peak 10°: 10 dB attenuation; relative ERP 10% of peak 20°: 7 dB attenuation; relative ERP 20% of peak 30°: 7 dB attenuation; relative ERP 20% of peak 40°: 3 dB attenuation; relative ERP 50.1% of peak 50°: 3 dB attenuation; relative ERP 50.1% of peak 60°: 3 dB attenuation; relative ERP 50.1% of peak 70°: 3 dB attenuation; relative ERP 50.1% of peak 80°: 0 dB attenuation; relative ERP 100% of peak 90°: 0 dB attenuation; relative ERP 100% of peak 100°: 0 dB attenuation; relative ERP 100% of peak 110°: 0 dB attenuation; relative ERP 100% of peak 120°: 0 dB attenuation; relative ERP 100% of peak 130°: 0 dB attenuation; relative ERP 100% of peak 140°: 0 dB attenuation; relative ERP 100% of peak 150°: 0 dB attenuation; relative ERP 100% of peak 160°: 0 dB attenuation; relative ERP 100% of peak 170°: 0 dB attenuation; relative ERP 100% of peak 180°: 0 dB attenuation; relative ERP 100% of peak 190°: 0 dB attenuation; relative ERP 100% of peak 200°: 0 dB attenuation; relative ERP 100% of peak 210°: 0 dB attenuation; relative ERP 100% of peak 220°: 3 dB attenuation; relative ERP 50.1% of peak 230°: 3 dB attenuation; relative ERP 50.1% of peak 240°: 7 dB attenuation; relative ERP 20% of peak 250°: 7 dB attenuation; relative ERP 20% of peak 260°: 10 dB attenuation; relative ERP 10% of peak 270°: 10 dB attenuation; relative ERP 10% of peak 280°: 10 dB attenuation; relative ERP 10% of peak 290°: 10 dB attenuation; relative ERP 10% of peak 300°: 10 dB attenuation; relative ERP 10% of peak 310°: 10 dB attenuation; relative ERP 10% of peak 320°: 10 dB attenuation; relative ERP 10% of peak 330°: 10 dB attenuation; relative ERP 10% of peak 340°: 10 dB attenuation; relative ERP 10% of peak 350°: 10 dB attenuation; relative ERP 10% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, 190°, 200°, 210° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 260°, 270°, 280°, 290°, 300°, 310°, 320°, 330°, 340°, 350° at 10 dB attenuation.

Parameters

Date 01/01/1900
Station BBC Radio Ulster/Foyle (FM)
Area Londonderry
Site Londonderry
Licence BBC000010
mb21 Londonderry
Frequency 93.1
NGR IC40431760
RDS PS BBC_Fyle
RDS PI C419
Switched PI
TP/TA
TMC
Lat 55.00421
Long -7.368968
Site Ht 175
In-Use Aerial Ht 77
In-UseERP/HP 15.6 kW
In-Use ERP/VP 15.6 kW
Max Dir
Licensed ERP/HP 16 kW
Licensed ERP/VP 16 kW

Pattern values

In-use horizontal pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
18.516.613.510.46.64.12.21.20.300.30.80.80.30.11.110.50.10.212.14.26.81014.416.918.919.319.9201918.919.219.319.1

In-use vertical pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
18.516.613.510.46.64.12.21.20.300.30.80.80.30.11.110.50.10.212.14.26.81014.416.918.919.319.9201918.919.219.319.1

Licensed horizontal pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
101077333300000000000000337710101010101010101010

Licensed vertical pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
101077333300000000000000337710101010101010101010