1CREATE TABLE orbit4ant (
 2        sensing_time timestamp NOT NULL,
 3        sid_num smallint NOT NULL,
 4        product bigint NOT NULL,
 5        x double precision NOT NULL,
 6        y double precision NOT NULL,
 7        z double precision NOT NULL,
 8        x_dot double precision NOT NULL,
 9        y_dot double precision NOT NULL,
10        z_dot double precision NOT NULL
11);
12ALTER TABLE orbit4ant ADD CONSTRAINT orbit4ant_c PRIMARY KEY (sid_num,sensing_time);