QZS-2 photos。http://qzss.go.jp/events/tsukuba_170407.htmlQZS-2 and QZS-4: Launch mass is 4,000kg (Bus weight 1,180kg, payload mass 370kg.) desighn life is 15year(longer than QZS-1 which was 12 years)QZS-3 (GSO) : Launch mass is 4,700kg (Bus weight 1,215kg, payload mass 475kg.)