Signal-in-Space and Positioning Performance of BDS Open Augmentation Service

Table 1

SSR message types in PPP-B2b [14].

Message type (in decimal)	Correction content
1	Satellite mask
2	Satellite orbit correction and user range accuracy
3	Differential code bias
4	Satellite clock correction
5	User range accuracy index
6	Clock correction and orbit correction–combination 1
7	Clock correction and orbit correction–combination 2
8–62	Reserved
63	Null