Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20100319070825/http://history.nasa.gov/CP-2156/p404.htm
CP-2156 Life In The Universe
Figure 5. Maximum sensitivities that
may be realized during the observing program in both the sky survey
(SS) and targeted observations (TS). For comparison, sloping lines
representing a range of transmitter EIRP have been included so that
the sensitivity required to detect classes of transmitters having the
indicated EIRPs can be deduced as a function of distance to the
transmitter.
