The transponder chart below shows the spectrum plots of Atlantic ocean transponders currently in use. (frequency list last updated on 11/02/2008)

The charts below were made with an SDR-IQ or SDR-14 from RF-Space coupled to an AOR-5000 receiver.

Frequency	Satellite Position	Transponder plot
243.7850	30.0 East
243.8225	39.1 West
243.9950 244.0050 244.0150 244.0250 244.0350 244.0450 244.0550 244.0650	28.3 East
244.0750 244.0800 244.0850 244.0900 244.0950 244.1000 244.1050 244.1100 244.1150 244.1250 244.1350 244.1450	23.3 West 23.3 West 15.5 West 15.5 West 15.5 West 15.5 West 23.3 West 15.5 West 23.3 West 23.3 West 23.3 West 23.3 West
245.2000	6.0 East
245.8500	1.0 West
248.9750 248.9850 248.9950 249.0050 249.0150 249.0250 249.0350 249.0450 249.0550	28.3 East
249.0150 249.0250 249.0350 249.0450 249.0550 249.0650 249.0750 249.0850 249.0950	28.3 East
249.1050 249.1150 249.1250 249.1350 249.1450 249.1550 249.1650 249.1750 249.1850	23.3 West
249.1450 249.1550 249.1650 249.1750 249.1850 249.1950 249.2050 249.2150 249.2250	23.3 West
249.4495	6.0 East
249.4795	1.0 West
249.4995	6.0 East
249.5295	1.0 West
249.8495	1.0 West
249.9000	1.0 West
249.9500	6.0 East
250.1295	1.0 West
250.1795	6.0 East
250.1995	1.0 West
250.5500	15.5 West
251.3250	10.0 West
251.7000	HEO
251.9500	28.3 East
252.0500	23.3 West
252.1500	15.5 West
253.6500	28.3 East
253.7500	23.3 West
253.8055	34.0 West
253.8500	23.3 West
253.9300	1.0 West
253.9800	6.0 East
254.1250	34.0 West
255.3500	28.3 East
255.4500	23.3 West
255.5500	15.5 West
256.9500	28.3 East
257.0500	23.3 West
257.1500	15.5 West
257.4250	34.0 West
257.4480	35.4 East
257.5050	34.0 West
257.6550	53.1 East
257.7000	1.0 West
257.9000	6.0 East
258.2250	16.3 East
258.4500	28.3 East
258.5500	23.3 West
258.6500	23.3 West
258.7750	10.0 West
260.5250	23.3 West
260.5750	28.3 East
260.6750	28.3 East
261.1000	6.0 East
261.2800	1.0 West
261.6500	15.5 West
262.0750	28.3 East
262.1750	28.3 East
262.2750	28.3 East
262.3750	28.3 East
262.6750	10.0 West
263.6250	23.3 West
263.7250	23.3 West
263.7750	28.3 East
263.8750	28.3 East
265.3500	28.3 East
265.4500	23.3 West
265.5500	23.3 West
266.8500	28.3 East
266.9500	23.3 West
267.0500	23.3 West
268.2500	28.3 East
268.3500	23.3 West
268.4500	23.3 West
268.6750	10.0 West
269.7500	28.3 East
269.8500	23.3 West
269.9500	23.3 West

Any additions or corrections, please email info at uhf-satcom dot com