Dear Henry,
You can reset all statistics (or by satellite) using the following sql commands:
psql -U admin sen4cap
sen4cap=# delete from reports.s1_report;
sen4cap=# select * from reports.sp_insert_s1_statistics();
Same for the other satellites, if you need for S2 or L8:
sen4cap=# delete from reports.s2_report;
sen4cap=# select * from reports.sp_insert_s2_statistics();
sen4cap=# delete from reports.l8_report;
sen4cap=# select * from reports.sp_insert_l8_statistics();
Best regards,
Cosmin