DATE 1970 1972 OBSERVER(S) SLYSH SITE NANCAY INSTR. SIZE (M) 40 x 240 SEARCH FREQ. (MHz) 1667 & 1665 FREQ. RES. (Hz) 4 kHz OBJECTS 10 NEAREST STARS FLUX LIMITS (W/m 2 ) TOTAL HOURS REFERENCE COMMENTS Looked for signals at OH frequency between observations of OH Masers.

DATE 1970 1972 OBSERVER(S) SLYSH, PASHCHENKO, RUDNITSKII, & LEKHT SITE NANCAY INSTR. SIZE (M) 40 x 240 SEARCH FREQ. (MHz) 1667 & 1665 FREQ. RES. (Hz) 4 kHz OBJECTS 5 OH MASERS FLUX LIMITS (W/m 2 ) TOTAL HOURS 2 REFERENCE 35, 36, 37 COMMENTS Searched for deviation from Gaussian Emission statistics in 5 OH Maser sources that might indicate transmissions from another civilization.

DATE 1971 & 1972 OBSERVER(S) VERSCHUUR OZPA SITE NRAO INSTR. SIZE (M) 91 & 43 SEARCH FREQ. (MHz) 1419.8 - 1421 & 1410 - 1430 FREQ. RES. (Hz) 490 & 6900 OBJECTS 9 STARS FLUX LIMITS (W/m 2 ) 5 x 10 -24 & 2 x 10 -23 TOTAL HOURS 13 REFERENCE 5 COMMENTS 384 channel correlator online.

DATE 1972 OBSERVER(S) KARDASHEV, POPOV, SOGLASNOV ET AL. SITE CRIMEA, RT-22 INSTR. SIZE (M) 22 SEARCH FREQ. (MHz) 8570 FREQ. RES. (Hz) OBJECTS GALACTIC CENTER FLUX LIMITS (W/m 2 ) TOTAL HOURS REFERENCE 42 COMMENTS Looked for statistical anomolies in continuum emission from galactic center.

DATE 1972 1974 OBSERVER(S) KARDASHEV, GINDILIS, POPOV, SOGLASNOV, SPANGENBERG, STEINBERG ET AL. SITE CAUCASUS, PAMIR, KAMCHATKA, MARS 7 SPACECRAFT INSTR. SIZE (M) 38, 60 SEARCH FREQ. (MHz) 371, 408, 458 & 535 FREQ. RES. (Hz) 5 MHz OBJECTS OMNI-DIRECTIONAL FLUX LIMITS (W/m 2 ) 2 x 10 -16 - 7 x 10 -15 TOTAL HOURS 150 REFERENCE 42 COMMENTS Eavesdropping search for pulses. Synchronous dispersion reception.

DATE 1972 1976 OBSERVER(S) BRIDLE & FELDMAN QUI APPELLE? SITE ARO INSTR. SIZE (M) 46 SEARCH FREQ. (MHz) 22235.08 5 MHz FREQ. RES. (Hz) 3 x 10 4 OBJECTS 70 STARS FLUX LIMITS (W/m 2 ) 1 x 10 -22 TOTAL HOURS 140 REFERENCE COMMENTS 70 solar-type stars within 45 light years have been observed to date.

DATE 1972 1976 OBSERVER(S) PALMER & ZUCKERMAN OZMA II SITE NRAO INSTR. SIZE (M) 91 SEARCH FREQ. (MHz) 1413 - 1425 & 1420.1 - 1420.7 FREQ. RES. (Hz) 6.4 x 10 4 & 4,000 OBJECTS 674 STARS FLUX LIMITS (W/m 2 ) 1 x 10 -23 TOTAL HOURS 500 REFERENCE 6 COMMENTS 384 channel correlator online.

DATE 1973 1974 OBSERVER(S) SHVARTSMAN ET AL. MANIA SITE SPECIAL ASTROPHYSICAL OBSERVATORY INSTR. SIZE (M) 0.6 SEARCH FREQ. (MHz) 5500 FREQ. RES. (Hz) D = 10 -6 OBJECTS 21 PECULIAR OBJECTS FLUX LIMITS (W/m 2 ) TOTAL HOURS REFERENCE 20 COMMENTS Optical search for short pulses of length 3 x 10 -7 to 300 seconds, & narrow laser lines. Prototype for later system on 6m telescope.

DATE 1973 1986 OBSERVER(S) DIXON, EHMAN, RAUB & KRAUS SITE OSURO INSTR. SIZE (M) 53 SEARCH FREQ. (MHz) 1420.4 REL.TO GAL.CEN. 250 kHz FREQ. RES. (Hz) 10 & 1 kHz OBJECTS ALL SKY SEARCH FLUX LIMITS (W/m 2 ) 1.5 x 10 -21 TOTAL HOURS 100,000 REFERENCE 7 COMMENTS Receiver is tuned to hydrogen rest frequency relative to Galactic Center (as a function of direction).

DATE 1974 OBSERVER(S) WISHNIA SITE COPERNICUS SATELLITE INSTR. SIZE (M) 1 SEARCH FREQ. (MHz) 3 x 10 9 FREQ. RES. (Hz) OBJECTS 3 STARS FLUX LIMITS (W/m 2 ) TOTAL HOURS REFERENCE 8 COMMENTS Search for UV laser lines.

DATE 1975 & 1976 OBSERVER(S) SAGAN & DRAKE SITE NAIC INSTR. SIZE (M) 305 SEARCH FREQ. (MHz) 1420, 1667 & 2380 (B = 3 MHz) FREQ. RES. (Hz) 1,000 OBJECTS FOUR GALAXIES FLUX LIMITS (W/m 2 ) 3 x 10 -25 TOTAL HOURS 100 REFERENCE 9 COMMENTS Search for type II civilizations in local group galaxies.

DATE 1975 1979 OBSERVER(S) ISRAEL & DE RUITER SITE WRST INSTR. SIZE (M) 1500 MAX BASELINE SEARCH FREQ. (MHz) 1415 FREQ. RES. (Hz) 4 x 10 6 OBJECTS 50 STAR FIELDS FLUX LIMITS (W/m 2 ) 2 x 10 -23 TOTAL HOURS 400 REFERENCE COMMENTS Searches of cleaned maps prepared for the WRST background survey. Looked for positional coincidence between residual signals & AGK2 stars.

DATE 1976 OBSERVER(S) CLARK, BLACK, CUZZI & TARTER SITE NRAO INSTR. SIZE (M) 43 SEARCH FREQ. (MHz) 8522 - 8523 FREQ. RES. (Hz) 5 OBJECTS 4 STARS FLUX LIMITS (W/m 2 ) 2 x 10 -24 TOTAL HOURS 7 REFERENCE COMMENTS VLBI high speed tape recorder combined with software direct Fourier transformation to produce extreme frequency resolution (non-real time).

DATE 1976 1985 OBSERVER(S) BOWYER ET AL. (U.C. BERKELEY) SERENDIP SITE HCRO INSTR. SIZE (M) 26 SEARCH FREQ. (MHz) 917 - 937, 1410 - 1430, 1602 - 1605, 1853 - 1873, 5 GHz FREQ. RES. (Hz) 2 x 500 OBJECTS ALL SKY SURVEY FLUX LIMITS (W/m 2 ) 1.15 x 10 -22 TOTAL HOURS REFERENCE 10 COMMENTS Automated survey parasitic to radio astronomical observations.

DATE 1977 OBSERVER(S) STULL & DRAKE SITE NAIC INSTR. SIZE (M) 305 SEARCH FREQ. (MHz) 1664 - 1668 FREQ. RES. (Hz) 0.5 OBJECTS 6 STARS FLUX LIMITS (W/m 2 ) 1 x 10 -26 TOTAL HOURS 10 REFERENCE 12 COMMENTS High speed tape combined with optical processor to produce extreme frequency resolution (non-real time).

DATE 1977 OBSERVER(S) TARTER, BLACK, CUZZI & CLARK SITE NRAO INSTR. SIZE (M) 91 SEARCH FREQ. (MHz) 1665 - 1667 FREQ. RES. (Hz) 5-Jan OBJECTS 200 STARS FLUX LIMITS (W/m 2 ) 1 x 10 -24 TOTAL HOURS 100 REFERENCE 11 COMMENTS VLBI high speed recorder combined with software direct Fourier transformation to produce extreme frequency resolution (non-real time).

DATE 1977 ON OBSERVER(S) WIELEBINSKI & SEIRADAKIS SITE MPIFR INSTR. SIZE (M) 100 SEARCH FREQ. (MHz) 1420 FREQ. RES. (Hz) 20,000,000 OBJECTS 3 STARS FLUX LIMITS (W/m 2 ) 4 x 10 -23 TOTAL HOURS 2 REFERENCE COMMENTS Candidate stars inserted into ongoing program which searches for pulsed signals with periods of 0.3 to 1.5 sec.

DATE 1978 OBSERVER(S) COHEN, MALKAN & DICKEY SITE NAIC, HRO, CSIRO INSTR. SIZE (M) 305, 36, 64 SEARCH FREQ. (MHz) 1665 + 1667, 22235.08, 1612.231 FREQ. RES. (Hz) 9500, 65000, 4500 OBJECTS 25 GLOBULAR CLUSTERS FLUX LIMITS (W/m 2 ) 1.8 x 10 -25 , 1.1 x 10 -22 , 1.5 x 10 -24 TOTAL HOURS 40, 20, 20 REFERENCE 14 COMMENTS Passive search for Type II & III civilizations using astronomical data originally observed to detect H 2 O & OH masers in globular clusters.

DATE 1978 OBSERVER(S) HOROWITZ SITE NAIC INSTR. SIZE (M) 305 SEARCH FREQ. (MHz) 1420 500 Hz FREQ. RES. (Hz) 0.015 OBJECTS 185 STARS FLUX LIMITS (W/m 2 ) 8 x 10 -28 TOTAL HOURS 80 REFERENCE 13, 25 COMMENTS Assumes that signal frequency was corrected at the source to arrive at rest in Heliocentric or barycentric laboratory frame.

DATE 1978 OBSERVER(S) KNOWLES & SULLIVAN SITE NAIC INSTR. SIZE (M) 305 SEARCH FREQ. (MHz) 130 - 500 (SPOT) FREQ. RES. (Hz) 1 OBJECTS 2 STARS FLUX LIMITS (W/m 2 ) 2 x 10 -24 TOTAL HOURS 5 REFERENCE 15 COMMENTS Attempted eavesdropping using MKI VLBI tapes as in Black, et al., 1977.

DATE 1978 OBSERVER(S) MAKOVETSKIJ, GINDILIS, ET AL. SITE ZELENCHUKSKAYA, RATAN-600 INSTR. SIZE (M) 7.4 x 450 (ONE SECTOR) SEARCH FREQ. (MHz) FREQ. RES. (Hz) OBJECTS BARNARD'S STAR FLUX LIMITS (W/m 2 ) TOTAL HOURS 6 DAYS REFERENCE 38 COMMENTS In accordance with Magic Time prediction by Makovetskij for Barnards Star and Nova Cygni 1975, signals were searched for in September, 1978.

DATE 1978 1980 OBSERVER(S) MICHAEL J. HARRIS SITE INTERPLANETARY NETWORK DATA INSTR. SIZE (M) PIONEER VENUS & VENERA 11 & 12 SPACECRAFT SEARCH FREQ. (MHz) 20 keV - 1 MeV FREQ. RES. (Hz) OBJECTS 54 GAMMA RAY BURST EVENTS FLUX LIMITS (W/m 2 ) TOTAL HOURS REFERENCE 44 COMMENTS Attempt to find 3 GRB events in a straight line, each having same velocity (from e e - annihilation line) that could indicate trajectory of an interstellar spacecraft.

DATE 1978 1996 OBSERVER(S) SHVARTSMAN ET AL. MANIA SITE SPECIAL ASTROPHYSICAL OBSERVATORY INSTR. SIZE (M) 6 SEARCH FREQ. (MHz) 5500 FREQ. RES. (Hz) D = 10 -6 OBJECTS 93 OBJECTS FLUX LIMITS (W/m 2 ) < 3 x 10 -4 OF THE OPTICAL FLUX IS VARIABLE IN ANY OBJECT OBSERVED TOTAL HOURS 250 REFERENCE 43 COMMENTS Have searched 30 Radio Objects with Continuous Optical Spectra to date, looking for optical pulses form potential Kardashev type II or III civilizations.

DATE 1979 OBSERVER(S) COLE & EKERS SITE CSIRO INSTR. SIZE (M) 64 SEARCH FREQ. (MHz) 5000 5 MHz & 1 MHz FREQ. RES. (Hz) 10 7 & 10 6 OBJECTS NEARBY F, G & K STARS FLUX LIMITS (W/m 2 ) 4 x 10 -18 TOTAL HOURS 50 REFERENCE 16 COMMENTS Simultaneous pulsed events in both 2 MHz & 10 MHz filters are sought detectors having time resolution of 4 seconds.

DATE 1979 OBSERVER(S) FREITAS & VALDES SITE LEUSCHNER OBSERVATORY, UCB INSTR. SIZE (M) 0.76 SEARCH FREQ. (MHz) 5500 Å FREQ. RES. (Hz) OBJECTS STABLE "HALO ORBITS" ABOUT L4 & L5 LIBRATION POINTS FLUX LIMITS (W/m 2 ) mv≤14 (magnitude) TOTAL HOURS 30 REFERENCE 17 COMMENTS Attempt to discover evidence of discrete objects (suchas interstellar probes) in stable orbits about L4, L5 by study of 90 photographic plates.

DATE 1979 - 1981 OBSERVER(S) TARTER, CLARK, DUQUET & LESYNA SITE NAIC INSTR. SIZE (M) 305 SEARCH FREQ. (MHz) 1420.4 ± 2 MHz & 1666 ± 2 MHz* FREQ. RES. (Hz) 5 & 600 OBJECTS 200 STARS FLUX LIMITS (W/m 2 ) 10-25** TOTAL HOURS 100 REFERENCE 21 COMMENTS Rapid 1-bit sampler & high speed tape recorder run in parallel with 1008 channel correlator.  Software direct Fourier transformation as in Black, et al., 1977

DATE 1979 - 1982 OBSERVER(S) JPL, UCB "SERENDIP" SITE DSS 14 INSTR. SIZE (M) 64 SEARCH FREQ. (MHz) S & X BAND (B=10 MHz) FREQ. RES. (Hz) 2 x (500 Hz) OBJECTS APPARENT POSITIONS OF NASA SPACECRAFT FLUX LIMITS (W/m 2 ) 8x10-24** TOTAL HOURS 400 REFERENCE 10 COMMENTS Automated survey parasitic to spacecraft tracking operations using 512 channel auto-correlator & 100 channel correlator with micro-processor control.