urn:nasa:pds:a12sws_solar_wind_28s_1hr:data:apollo12_sws_28s_19740407 1.0 1.23.0.0 Product_Observational 2025 This 28-s data set is the highest resolution data set available from the Apollo 12 Solar Wind Spectrometer instrument, and was reformatted by NSSDC for easier access and use. During the lunar night there is no solar wind signal so there are data gaps of about 15 days each lunation. 2025-09-26 1.0 Initial version. 1974-04-07T00:00:53Z 1974-04-07T23:59:42Z Apollo 12 Mission urn:nasa:pds:context:investigation:mission.apollo_12 data_to_investigation The Apollo 12 Lunar Surface Experiments Package Host urn:nasa:pds:context:instrument_host:spacecraft.a12a is_instrument_host Apollo 12 Lunar Surface Experiments Package Solar Wind Spectrometer Instrument urn:nasa:pds:context:instrument:sws.a12a is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target apollo12_sws_28s_19740407.tab 2007-06-11T14:05:10Z

0 320 7-Bit ASCII Text

TABLE 320 2454 Carriage-Return Line-Feed 21 0 160 EPOCH 1 1 ASCII_Date_Time_YMD 19 Universal Time JULIAN_DATE 2 22 ASCII_Real 13 Julian date for the universal time in column 1. DENSITY 3 37 ASCII_Real 5 protons/cm**3 Proton Density. -99.9 AP_RATIO 4 44 ASCII_Real 5 Alpha to Proton Ratio -9.99 VEL 5 51 ASCII_Integer 4 km/s Proton Bulk Speed. -999 VTH 6 57 ASCII_Integer 3 km/s Proton Thermal Velocity. -99 EAST 7 62 ASCII_Real 5 degrees Proton Flow Angle toward East in Solar Ecliptic Coordinates. -99.9 NORTH 8 69 ASCII_Real 5 degrees Proton Flow Angle toward North in Solar Ecliptic Coordinates. -99.9 FLAG 9 76 ASCII_Integer 10 FLAG Word bits not separately shown; packed in low order bits. These FLAG Bits of no interest to user; kept as record of original. 1111111111 IA 10 88 ASCII_Integer 1 Flag for how angle alpha was derived. If IA = 0, alpha is measured; = 1, alpha is assumed; = 2, alpha is limited; = 3, cup seeing protons is too far from sun direction to be plausible. 9 IB 11 91 ASCII_Integer 2 Flag for how angle beta was derived. If IB = 0, beta is measured; = 1, beta is assumed; = 2, beta is limited; = 3, cup seeing protons is too far from sun direction to be plausible. 9 IDISCP 12 95 ASCII_Integer 2 1 means that side cup not next to cup A has more current than cups B or C 9 GAIN 13 99 ASCII_Integer 2 Gain Level: 0 = Low; 1 = High 9 RMS 14 103 ASCII_Real 5 percentage Percentage Error in Fitting Program. -99.9 KUPA 15 110 ASCII_Integer 2 Number of side cup (not vertical) with most current 9 CURA 16 114 ASCII_Real 6 picoamps Current in Cup A (shown by KUPA). -999.9 CURB 17 122 ASCII_Real 6 picoamps Current in Cup B (CCW from Cup A). -999.9 CURC 18 130 ASCII_Real 6 picoamps Current in Cup C (CW from Cup A). -999.9 CUR7 19 138 ASCII_Real 6 picoamps Current in Cup 7 (center, vertical). -999.9 FACTD 20 146 ASCII_Real 4 Correction for M-B least sq est of density 9.99 XNOISE 21 152 ASCII_Real 6 picoamps Noise level used in estimating angles. -999.9