0400 hrs pst . i observed a bright light that appeared to be a star going pulsar or super nova until the light went out. suddenly the flash appeared again and the object appeared to go deeper into space, this occurred several times . than the object appeared to be hovering off the coast of southern ca over the area of nas point magu. after hovering for some period the object flashed / pulsed and moved across the sky appearing to be in near space, racing across the sky pulse to pulse. the object changed direction and altitude but primarily was on a west to east heading. the object displayed no other lights other than the pulse of light and no sound. the object could not be seen, tracking the pulses was the only way to track the object. aside from my professional experience i am a avid sky watcher and it's why i do my 4 mile walk at 3am.I know what a typical satellite looks like ! this was no satellite that i am aware of anybody possessing and this was no air vehicle . this was a space vehicle, and i hope it was ours ! this vehicle was a full authority, course , heading , altitude on demand control space vehicle. maybe a really , really advanced satellite but i more believe it was a hypersonic pulse jet type space vehicle , again hopefully ours. if this was not ours i believe it was not from this planet ! i am a 40yr+ aerospace , military , flight test , commercial professional with thousands of flights/hours in and watching the sky . i am in awe,,, at 60 years young,this is my very first unexplainable event and seriously ,,, i have seen about everything ! i considered taking a photo but it looked like a star or pulsar moving across space ! best rwk