Inclined Geosynchronous Orbit (IGSO)

Same altitude as GEO but tilted — traces a figure-8 ground track over a single longitude.

IGSO has the same 24-hour period as GEO but at an inclined orbital plane. The result: from the ground, the satellite traces a figure-8 pattern over a single longitude. China's BeiDou IGSO segment and Japan's QZSS Quasi-Zenith system use this to provide enhanced coverage at high latitudes where pure GEO performs poorly.

Examples

• IRNSS-1I
• LUDI TANCE-4 01A
• IRNSS-1A
• BEIDOU-2 IGSO-5 (C10)
• SHIYAN-29
• SHIYAN-9 (SY-9)
• INMARSAT 3-F1
• LUCH 5B (SDCM/PRN 125)
• BEIDOU-2 IGSO-7 (C16)
• QZS-2 (QZSS/PRN 194)
• BEIDOU-2 IGSO-6 (C13)
• TDRS 5
• UFO 2 (USA 95)
• USA 115 (MILSTAR-1 2)
• BSAT-2A
• BEIDOU-2 IGSO-4 (C09)
• BEIDOU-3S IGSO-2S (C56)
• USA 134
• FLTSATCOM 8 (USA 46)
• BEIDOU-2 IGSO-3 (C08)
• BEIDOU-3 IGSO-1 (C38)
• QZS-4 (QZSS/PRN 195)
• BEIDOU-3S IGSO-1S (C31)
• USA 164 (MILSTAR-2 3)