SES-18: IOT 141.2°W, final 103.05°W.
SES-19: IOT 142.8°W, final 134.9°W.
SES-20: IOT 141.2°W, final 103.1°W (already there since 20 Dec 2022)
SES-21: IOT 142.8°W, final 131.0°W (already there since 23 Nov 2022)
Probably SES-18 will replace SES-20 eventually, then SES-20 goes elsewhere?