Londonderry - Ofcom TX Visualiser

← Back to FM/VHF search · Map this site name · Offline SVG map

Londonderry

Londonderry · Cool FM/Downtown Radio · 102.4 MHz

Historic names: Downtown Radio, DTRFM (licence AL000121)

Antenna pattern

In-use horizontal pattern

ERP field: In-UseERP/HP = 5 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 20 dB attenuation; relative ERP 1% of peak 10°: 20 dB attenuation; relative ERP 1% of peak 20°: 20 dB attenuation; relative ERP 1% of peak 30°: 14 dB attenuation; relative ERP 4% of peak 40°: 10 dB attenuation; relative ERP 10% of peak 50°: 6 dB attenuation; relative ERP 25.1% of peak 60°: 4 dB attenuation; relative ERP 39.8% of peak 70°: 2 dB attenuation; relative ERP 63.1% of peak 80°: 0 dB attenuation; relative ERP 100% of peak 90°: 0 dB attenuation; relative ERP 100% of peak 100°: 1 dB attenuation; relative ERP 79.4% of peak 110°: 1 dB attenuation; relative ERP 79.4% 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°: 2 dB attenuation; relative ERP 63.1% of peak 160°: 2 dB attenuation; relative ERP 63.1% of peak 170°: 1 dB attenuation; relative ERP 79.4% of peak 180°: 1 dB attenuation; relative ERP 79.4% of peak 190°: 2 dB attenuation; relative ERP 63.1% of peak 200°: 3 dB attenuation; relative ERP 50.1% of peak 210°: 6 dB attenuation; relative ERP 25.1% of peak 220°: 10 dB attenuation; relative ERP 10% of peak 230°: 14 dB attenuation; relative ERP 4% of peak 240°: 20 dB attenuation; relative ERP 1% of peak 250°: 20 dB attenuation; relative ERP 1% of peak 260°: 20 dB attenuation; relative ERP 1% of peak 270°: 16 dB attenuation; relative ERP 2.5% of peak 280°: 17 dB attenuation; relative ERP 2% of peak 290°: 20 dB attenuation; relative ERP 1% of peak 300°: 16 dB attenuation; relative ERP 2.5% of peak 310°: 13 dB attenuation; relative ERP 5% of peak 320°: 14 dB attenuation; relative ERP 4% of peak 330°: 17 dB attenuation; relative ERP 2% of peak 340°: 17 dB attenuation; relative ERP 2% of peak 350°: 17 dB attenuation; relative ERP 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): 80°, 90°, 120°, 130°, 140° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 20°, 240°, 250°, 260°, 290° at 20 dB attenuation.

In-use vertical pattern

ERP field: In-Use ERP/VP = 5 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 17 dB attenuation; relative ERP 2% of peak 10°: 14 dB attenuation; relative ERP 4% of peak 20°: 12 dB attenuation; relative ERP 6.3% of peak 30°: 9 dB attenuation; relative ERP 12.6% of peak 40°: 6 dB attenuation; relative ERP 25.1% of peak 50°: 4 dB attenuation; relative ERP 39.8% of peak 60°: 2 dB attenuation; relative ERP 63.1% of peak 70°: 1 dB attenuation; relative ERP 79.4% of peak 80°: 1 dB attenuation; relative ERP 79.4% of peak 90°: 3 dB attenuation; relative ERP 50.1% of peak 100°: 5 dB attenuation; relative ERP 31.6% of peak 110°: 4 dB attenuation; relative ERP 39.8% of peak 120°: 2 dB attenuation; relative ERP 63.1% of peak 130°: 1 dB attenuation; relative ERP 79.4% of peak 140°: 1 dB attenuation; relative ERP 79.4% of peak 150°: 3 dB attenuation; relative ERP 50.1% of peak 160°: 3 dB attenuation; relative ERP 50.1% of peak 170°: 2 dB attenuation; relative ERP 63.1% of peak 180°: 1 dB attenuation; relative ERP 79.4% of peak 190°: 0 dB attenuation; relative ERP 100% of peak 200°: 2 dB attenuation; relative ERP 63.1% of peak 210°: 3 dB attenuation; relative ERP 50.1% of peak 220°: 6 dB attenuation; relative ERP 25.1% of peak 230°: 8 dB attenuation; relative ERP 15.8% of peak 240°: 11 dB attenuation; relative ERP 7.9% of peak 250°: 13 dB attenuation; relative ERP 5% of peak 260°: 16 dB attenuation; relative ERP 2.5% of peak 270°: 17 dB attenuation; relative ERP 2% of peak 280°: 20 dB attenuation; relative ERP 1% of peak 290°: 20 dB attenuation; relative ERP 1% of peak 300°: 20 dB attenuation; relative ERP 1% of peak 310°: 20 dB attenuation; relative ERP 1% of peak 320°: 20 dB attenuation; relative ERP 1% of peak 330°: 20 dB attenuation; relative ERP 1% of peak 340°: 20 dB attenuation; relative ERP 1% of peak 350°: 20 dB attenuation; relative ERP 1% 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): 190° at 0 dB attenuation.

Deepest restriction(s): 280°, 290°, 300°, 310°, 320°, 330°, 340°, 350° at 20 dB attenuation.

Licensed horizontal pattern

ERP field: Licensed ERP/HP = 5 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 14 dB attenuation; relative ERP 4% of peak 10°: 14 dB attenuation; relative ERP 4% of peak 20°: 8 dB attenuation; relative ERP 15.8% of peak 30°: 8 dB attenuation; relative ERP 15.8% of peak 40°: 3 dB attenuation; relative ERP 50.1% of peak 50°: 3 dB attenuation; relative ERP 50.1% of peak 60°: 1 dB attenuation; relative ERP 79.4% of peak 70°: 1 dB attenuation; relative ERP 79.4% 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°: 1 dB attenuation; relative ERP 79.4% of peak 200°: 1 dB attenuation; relative ERP 79.4% of peak 210°: 3 dB attenuation; relative ERP 50.1% of peak 220°: 3 dB attenuation; relative ERP 50.1% of peak 230°: 8 dB attenuation; relative ERP 15.8% of peak 240°: 8 dB attenuation; relative ERP 15.8% of peak 250°: 14 dB attenuation; relative ERP 4% of peak 260°: 14 dB attenuation; relative ERP 4% of peak 270°: 14 dB attenuation; relative ERP 4% of peak 280°: 14 dB attenuation; relative ERP 4% of peak 290°: 14 dB attenuation; relative ERP 4% of peak 300°: 14 dB attenuation; relative ERP 4% of peak 310°: 14 dB attenuation; relative ERP 4% of peak 320°: 14 dB attenuation; relative ERP 4% of peak 330°: 14 dB attenuation; relative ERP 4% of peak 340°: 14 dB attenuation; relative ERP 4% of peak 350°: 14 dB attenuation; relative ERP 4% 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° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 250°, 260°, 270°, 280°, 290°, 300°, 310°, 320°, 330°, 340°, 350° at 14 dB attenuation.

Licensed vertical pattern

ERP field: Licensed ERP/VP = 5 kW

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 14 dB attenuation; relative ERP 4% of peak 10°: 14 dB attenuation; relative ERP 4% of peak 20°: 8 dB attenuation; relative ERP 15.8% of peak 30°: 8 dB attenuation; relative ERP 15.8% of peak 40°: 3 dB attenuation; relative ERP 50.1% of peak 50°: 3 dB attenuation; relative ERP 50.1% of peak 60°: 1 dB attenuation; relative ERP 79.4% of peak 70°: 1 dB attenuation; relative ERP 79.4% 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°: 1 dB attenuation; relative ERP 79.4% of peak 200°: 1 dB attenuation; relative ERP 79.4% of peak 210°: 3 dB attenuation; relative ERP 50.1% of peak 220°: 3 dB attenuation; relative ERP 50.1% of peak 230°: 8 dB attenuation; relative ERP 15.8% of peak 240°: 8 dB attenuation; relative ERP 15.8% of peak 250°: 14 dB attenuation; relative ERP 4% of peak 260°: 14 dB attenuation; relative ERP 4% of peak 270°: 14 dB attenuation; relative ERP 4% of peak 280°: 14 dB attenuation; relative ERP 4% of peak 290°: 14 dB attenuation; relative ERP 4% of peak 300°: 14 dB attenuation; relative ERP 4% of peak 310°: 14 dB attenuation; relative ERP 4% of peak 320°: 14 dB attenuation; relative ERP 4% of peak 330°: 14 dB attenuation; relative ERP 4% of peak 340°: 14 dB attenuation; relative ERP 4% of peak 350°: 14 dB attenuation; relative ERP 4% 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° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 250°, 260°, 270°, 280°, 290°, 300°, 310°, 320°, 330°, 340°, 350° at 14 dB attenuation.

Parameters

Date 01/01/1900
Station Cool FM/Downtown Radio
Area Londonderry
Site Londonderry
Licence AL000121
mb21 Londonderry
MCA map Open Ofcom MCA map
Frequency 102.4
NGR IC40431760
RDS PS Downtown
RDS PI CC86
Switched PI
TP/TA Y
TMC
Lat 55.00421
Long -7.368968
Site Ht 175
In-Use Aerial Ht 77
In-UseERP/HP 5 kW
In-Use ERP/VP 5 kW
Max Dir 130
Licensed ERP/HP 5 kW
Licensed ERP/VP 5 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°
2020201410642001100022112361014202020161720161314171717

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°
171412964211354211332102368111316172020202020202020

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°
1414883311000000000001133881414141414141414141414

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°
1414883311000000000001133881414141414141414141414