In 1957 the world ran into its gardens and out into the streets to watch
By 1985 the superpowers had developed astonishing capabilities in those directions. Especially dramatic was space photography of such high resolution that soldiers marching on earth could be counted in their columns. In the event of war, the Russians would be especially interested in seeing what was going on in the Atlantic and on the eastern seaboard of the United States. The US, on behalf of the West, had a prime interest in observing military developments and deployments in the heartland of the USSR by photography and electronic eavesdropping, particularly during periods of tension or actual war, but also in routine times of peace. Communications satellites acting as relay stations in space had not only enormously increased the extent of available facilities, they had enhanced the reliability and quality of radio transmission and reception out of all recognition. They had also provided remarkable navigation assistance, with an accuracy down to a few metres, to ships, submarines and aircraft.
Just as this inner space was now a quite readily accessible extension of the atmosphere, so its military opportunities proved to be, in the main, extensions of existing earth-based facilities, considerably enhanced but not unique — and therefore never wholly indispensable. There was just one activity, of critical interest to the Allies, where the time advantages in war might be so great that it was perhaps in a special category and an exception to that general rule. That activity was electronic reconnaissance. As noted elsewhere in this book, the West enjoyed a decided advantage over the Communist East in ECM, and for that reason the Soviet Union in peacetime shrouded its communications with every possible veil of secrecy. If the West was to exploit its electronic advantage to the fullest extent it needed to know from the outset of hostilities just which parts of the frequency spectrum, and in what modes of emission, the Soviet forces would operate. This information was urgently needed as soon as the battle was joined; the Soviet cloak of secrecy had to be torn aside. This could all be done very much more quickly and comprehensively from space reconnaissance satellites than would ever have been possible by monitoring the communications networks in the war theatre on the ground.
After the early scramble to catch up with the Soviet Union, when spurred into competition by the success of the