Triangular shape of 3 light points travelling at high altitude

49.06.00 LATITUDE, -121.29.00 LONGITUDE WAS APPROX SIGHTING LOCATION. 3 MID INTENSITY SATELLITE POINTS POSITIONED IN THE SHAPE OF AN EQILATERAL TRIANGULAR WITH THE "TOP" VERTICE POINTING IN THE DIRECTION OF TRAVEL. THE VERTICES MAINTAINED THEIR DISTANCE FROM ONE ANOTHER AND ANGLES WITH RESPECT TO EACH OTHER VERY CONSISTENTLY DURING ITS 1.5-2 MINUTE PASSAGE. MOVED OVERHEAD PROCEEDING FROM THE WEST TO THE EAST BUT CURVED TOWARD THE SOUTH EAST AFTER THE 1/2 WAY POINT. STEADY, SILENT TRAVEL SIMILAR TO A SATELLITE BUT I'VE NEVER SEEN 2 LET ALONE 3 OF THEM TRAVELLING TOGETHER AND HOLDING STATIC RELATIVE POSITIONS TO EACH OTHER. SAME SPEED SAME DIRECTION EQUAL INTENSITY. I'VE GAZED FOR SATELLITES SINCE FIRST SEEING THE ORIGINAL SPUTNIK AND THIS HAD THE APPEARANCE OF A RELATIVELY UNIQUE VIEWING EVENT. AT TIMES THE STARS PASSING THROUGH THE 'INTERIOR' OF THE TRIANGLULAR SHAPE APPEARED TO DISAPPEAR ALTHOUGH IT WAS DIFIICULT TO TELL IF THAT WAS A FUNCTION OF THE RELATIVE BRIGHTNESS OF THE 3 POINTS OF LIGHT TRAVELING TOGETHER BLOTTING OUT DIM STARS. THE 'AREA' ENCOMPASSED BY THE TRIANGULAR FORMATION WOULD CONTAIN ABOUT THE SAME AREA AS A FULL MOON WHEN IT IS DIRECTLY OVERHEAD. THE SKY WAS ABSOLUTELY CLOUDLESS, NO VISIBLE MOON NEARBY AND WE WERE IN THE MOUNTAINS AT OUR CABIN.
We do not know what the witnesses observed.  Our first suspicion was that the lights may have been the triplet of what are thought to be the U. S. Navy "NOSS" satellites.  Just a guess.  PD