AIR speed parameters (KTAS, KCAS) are sensed by the aircraft onboard systems. You are correct that the aircraft has a trig calculated speed of 151 knots. Your making the assumption that all 151 knots of actual speed would be sensed by the on board systems at a 61 degree AOA. Maybe you're right, I don't know, but the other possibility is that at that AOA (61 degrees) there is some disturbed airflow across the pitot. The pitots are roughly longitudinal. Most "normal" large aircraft flight conditions are flown with the pitots quite a bit less than 60 degrees from the relative airflow.
How could you conclude that I was assuming that the 151 or 152 knots of "airspeed" was being sensed by the on-board systems when I noted that: "Also, the aircraft airspeed measurement system will not be able to accurately convey this speed to the pilots due to the very high angle of attack involved."?. I deliberately avoided the word "indicated", not to mention "calibrated", for the same reason: it is almost certain, not just a possibility, that the indicated airspeed was something different than the actual airspeed because of the angle of attack involved. Not to mention that since the only velocity numbers given were rate of descent and ground speed, 151/152 knots is likely not the actual airspeed and 61 degrees is likely not the actual angle of attack, although they are in the ballpark. My only point was that the
actual airspeed, whatever it was, is measured with respect to the relative wind, not the horizon or the reference waterline of the fuselage. With respect to the actual angle of attack and airspeed, even with a hurricane-force surface-wind velocity the angle of attack was really, really high and the airspeed, meaningless as a result.