ISIS-2 Topside Sounder Average Ionogram over Ascension Island, United Kingdom: ACN, Latitude -8, Longitude 346

These Ionograms were digitized from the original ISIS-2 7-Track Analog Telemetry Tapes using the Facilities of the former Data Evaluation Laboratory at the NASA/GSFC....本批电离图（ionogram）系由原始ISIS-2 7轨模拟遥测磁带数字化生成，数字化过程依托美国国家航空航天局戈达德太空飞行中心（NASA/GSFC）前数据评估实验室的设施完成。