Datasets:

KKcoding2025
/

evo-eval_data

+                              O M N I 2  DATA SET
+  The  /data/omni/low_res_omni/ directory contains the hourly mean values of
+  the interplanetary magnetic  field (IMF) and solar wind plasma parameters
+  measured by various spacecraft near  the  Earth's  orbit,  as  well  as
+  geomagnetic and solar activity indices, and energetic proton fluxes
+  known as OMNI2 data.
+  OMNI2 was created at NSSDC in 2003 as a successor to the OMNI data set
+  first created in the mid-1970's.
+  Time spans of various parameters are periodically extended.
+   The documentation file at
+    https://omniweb.gsfc.nasa.gov/html/ow_data.html
+    gives the current time spans of the following parameter groups:
+    Magnetic field
+    Plasma
+    Kp index and sunspot number
+    AE, AL,AU index
+    Provisional AE, AL, AU index
+    Quick look AE, AL, AU index
+    Dst index
+    Provisional Dst index
+    Quick look Dst
+    Energetic proton fluxes
+    ap-index and f10.7_index
+    PC(N) index
+ ---------------
+ Note: see "extended" directoty for more parameters.
+ ----------------------------------------------
+  Data gaps were filled with dummy numbers for the missing hours or entire
+  days to make all files of equal length.  The character '9' is used to
+  fill all fields for missing data according to their format, e.g.
+  ' 9999.9' for a field with the FORTRAN format F7.1. Note that format F7.1
+  below really means (1X,F6.1),etc.
+  This directory  includes  two types of the ASCII flat files: OMNI2_YYYY.DAT,
+  and OMNI_MYYYY.DAT  where  YYYY  is  a given year. The OMNI2_YYYY.DAT files
+  contain the original data where  the  IMF  and solar wind velocity vectors
+  are presented in GSE and, for IMF, GSM coordinate  systems.  The modified
+  OMNI_MYYYY.DAT files have been  created  from  these  files with reformatting
+  for COHOWeb compatibility and with the  IMF and velocity
+  vectors having been transformed to  RTN coordinate system.
+---------------------------------------------------------------------------
+Daily and 27-day Averages files: omni_01_av.dat; omni_27_av.dat; omni_m_daily.dat
+We have computed daily and 27-day average values for all the OMNI parameters in the
+OMNI2_YYYY.dat files, and we have computed daily averages from the OMNI_MYYYY.dat files.
+We have made these lower resolution averages also accessible via OMNIWeb and via anon/ftp.
+Only arithmetic averaging was done.  (No averaging of logarithms.)  No threshold numbers
+of finer scale points were required.
+The daily averages are taken over OMNI's basic hourly values, and the 27-
+day averages are taken over the daily averages.  The corresponding standard
+deviations relate only to these averagings and do not capture the
+variances in the higher resolution data.
+The 27-day averages are for discrete Bartels rotation numbers.  Thus the
+first such average fully within 1999 spans January 9 through February 4.
+The record format for the daily and 27-day averages is the same as for the
+hourly data, although certain fields have special meanings.
+The time words (year, day, hour) correspond to the first hour of the
+average.
+The ID's for the magnetic field and plasma spacecraft are set to zero,
+since the daily and 27-day averages frequently involve data from multiple
+spacecraft.
+The numbers of fine scale points in the plasma and field averages are
+counts of (1) hourly values contributing to daily averages or (2) daily
+values contributing to 27-day averages.  NOTE THAT WE HAVE NOT REQUIRED ANY
+MINIMUM NUMBER OF POINTS TO COMPUTE AN AVERAGE.  For cases where there was
+only one point, the standard deviations were set to zero.
+Kp was treated specially.  After determining daily or 27-averages from
+basic values such as 10 (1), 13 (1+), 17 (2-), 20 (2), the average was
+rounded to the nearest "standard value" of Kp (i.e., 10, 13, 17, 20, ...).
+For cases where the average was exactly in the middle between standard
+values (e.g., 15), the lower standard value (13 in this case) was used.
+-------------------------------------------------------------------------
+                         OMNI2_YYYY.DAT FORMAT DESCRIPTION
+WORD  FORMAT  Fill Value         MEANING                  UNITS/COMMENTS
+ 1      I4              Year                              1963, 1964, etc.
+ 2      I4              Decimal Day                       January 1 = Day 1
+ 3      I3              Hour                              0, 1,...,23
+ 4      I5   9999      Bartels rotation number
+ 5      I3    99        ID for IMF spacecraft             See table
+ 6      I3    99        ID for SW plasma spacecraft       See table
+ 7      I4   999       # of points in the IMF averages
+ 8      I4   999       # of points in the plasma averages
+ 9     F6.1  999.9     Field Magnitude Average |B|       1/N SUM |B|, nT
+10     F6.1  999.9     Magnitude of Average Field Vector sqrt(Bx^2+By^2+Bz^2)
+11     F6.1  999.9     Lat.Angle of Aver. Field Vector   Degrees (GSE coords)
+12     F6.1  999.9     Long.Angle of Aver.Field Vector   Degrees (GSE coords)
+13     F6.1  999.9     Bx GSE, GSM                       nT
+14     F6.1  999.9     By GSE                            nT
+15     F6.1  999.9     Bz GSE                            nT
+16     F6.1  999.9     By GSM                            nT
+17     F6 1  999.9     Bz GSM                            nT
+                                                      see  http://geo.phys.spbu.ru/~tsyganenko/Geopack-2008.html
+                                                          developed by Drs. Nikolai Tsyganenko.
+18     F6.1  999.9     sigma|B|            RMS Standard Deviation in average
+                                               magnitude (word 10), nT
+19     F6.1  999.9     sigma B             RMS Standard Deviation in field
+                                            vector, nT (**)
+20     F6.1  999.9     sigma Bx            RMS Standard Deviation in GSE
+                                            X-component average, nT
+21     F6.1  999.9     sigma By            RMS Standard Deviation in GSE
+                                            Y-component average, nT
+22     F6.1  999.9     sigma Bz            RMS Standard Deviation in GSE
+                                             Z-component average, nT
+23     F9.0  9999999.  Proton temperature                Degrees, K
+24     F6.1  999.9     Proton Density                    N/cm^3
+25     F6.0  9999.     Plasma (Flow) speed               km/s
+26     F6.1  999.9     Plasma Flow Long. Angle    Degrees, quasi-GSE*
+27     F6.1  999.9     Plasma  Flow Lat. Angle     Degrees, GSE*
+28     F6.3  9.999     Na/Np                    Alpha/Proton ratio
+29     F6.2  99.99     Flow Pressure            P (nPa) = (1.67/10**6) * Np*V**2 * (1+ 4*Na/Np)
+                                                for hours with non-fill Na/Np ratios and
+                                                P (nPa) = (2.0/10**6) * Np*V**2
+                                                for hours with fill values for Na/Np
+30     F9.0  9999999.  sigma T                           Degrees, K
+31     F6.1  999.9     sigma N                           N/cm^3
+32     F6.0  9999.     sigma V                           km/s
+33     F6.1  999.9     sigma phi V                       Degrees
+34     F6.1  999.9     sigma theta V                     Degrees
+35     F6.3  9.999     sigma-Na/Np
+36     F7.2  999.99    Electric field         -[V(km/s) * Bz (nT; GSM)] * 10**-3. (mV/m)
+37     F7.2  999.99    Plasma beta            Beta = [(T*4.16/10**5) + 5.34] * Np / B**2
+38     F6.1  999.9     Alfven mach number      Ma = (V * Np**0.5) / 20 * B
+39     I3    99        Kp               Planetary Geomagnetic Activity Index
+                                       (e.g. 3+ = 33, 6- = 57, 4 = 40, etc.)
+40      I4   999        R                          Sunspot number (new version 2)
+41      I6   99999     DST Index                    nT, from Kyoto
+42      I5   9999      AE-index                    nT, from Kyoto
+43     F10.2 999999.99 Proton flux                 number/cmsq sec sr >1 Mev
+44     F9.2  99999.99  Proton flux                 number/cmsq sec sr >2 Mev
+45     F9.2  99999.99  Proton flux                 number/cmsq sec sr >4 Mev
+46     F9.2  99999.99  Proton flux                 number/cmsq sec sr >10 Mev
+47     F9.2  99999.99  Proton flux                 number/cmsq sec sr >30 Mev
+48     F9.2  99999.99  Proton flux                 number/cmsq sec sr >60 Mev
+49      I3   0         Flag(***)                       (-1,0,1,2,3,4,5,6)
+50       I4   999      ap-index                     nT
+51       F6.1 999.9    f10.7_index                  ( sfu = 10-22W.m-2.Hz-1)
+52       F6.1 999.9    PC(N) index
+53       I6   99999    AL-index, from Kyoto         nT
+54       I6   99999    AU-index, from Kyoto         nT
+55       F5.1  99.9   Magnetosonic mach number= = V/Magnetosonic_speed
+                     Magnetosonic speed = [(sound speed)**2 + (Alfv speed)**2]**0.5
+                     The Alfven speed = 20. * B / N**0.5
+                     The sound speed = 0.12 * [T + 1.28*10**5]**0.5
+                   About Magnetosonic speed check  http://ftpbrowser.gsfc.nasa.gov/bow_derivation1.html also
+ --------------------------------------------------------------------------------------------------
+                                C O M M E N T S
+   (*)   Quasi-GSE for the flow longitude angle means the angle increases from zero
+         to positive values as the flow changes from being aligned along the -X(GSE)
+         axis towards the +Y(GSE) axis.  The flow longitude angle is positive for
+         flow from west of the sun, towards +Y(GSE).
+         The flow latitude angle is positive for flow from south of the sun,
+         towards +Z(GSE)
+   (**) - sigma B is sqrt((sigma Bx)^2 + (sigma By)^2 +(sigma Bz)^2)
+  (***) - If the flag is 0 there are no Proton Flux data, or all of the
+          Proton Flux data are contaminated by the magnetospheric events
+          If the flag is 1 then the channels >1,>2,>4,>10,>30 Mev were
+          judged to have magnetospheric `contamination'
+          If the flag is 2 then the channels >1,>2,>4,>10 Mev were judged
+          to have magnetospheric `contamination'
+          If the flag is 3 then the channels>1,>2,>4 Mev were judged to
+          have magnetospheric `contamination'
+          If the flag is 4 then the channels >1,>2 Mev were judged to have
+          magnetospheric `contamination'
+          If the flag is 5 then the channels >1 Mev channels were judged to
+          have magnetospheric `contamination'
+          If the flag is 6 then no channel was judged to have magnetospheric
+          `contamination'
+           If the flag is -1 then data were not checked for magnetospheric
+           contamination; this is relevant after 1988/306.
+                         TABLE: SPACECRAFT IDENTIFIERS
+       Spacecraft Name                                    Spacecraft ID
+       IMP 1 (Explorer 18)                                      18
+       IMP 3 (Explorer 28)                                      28
+       IMP 4 (Explorer 34)                                      34
+       IMP 5 (Explorer 41)                                      41
+       IMP 6 (Explorer 43)                                      43
+       IMP 7 (Explorer 47)                                      47 MAG and Plasma/MIT
+       IMP 7 (Explorer 47)                                      44 Plasma/LANL
+       IMP 8 (Explorer 50)                                     50 MAG and Plasma/MIT
+       IMP 8 (Explorer 50)                                     45 Plasma/LANL
+       AIMP 1 (Explorer 33)                                     33
+       AIMP 2 (Explorer 35)                                     35
+       HEOS 1 and HEOS 2                                         1
+       VELA 3                                                    3
+       OGO 5                                                     5
+       Merged LANL VELA Speed Data (July 1964 - March 1971)     97
+       Merged LANL IMP T,N,V (Including all IMP 8 LANL Plasma)  98
+       ISEE 1                                                   11
+       ISEE 2                                                   12
+       ISEE 3                                                   13
+       PROGNOZ 10                                               10
+       WIND                                                     51 -mag, plasma_KP; 52-Plasma_definitive
+       ACE                                                      71
+       Geotail                                                  60
+       No spacecraft                                            99
+   ---------------------------------------------------------------------------------
+                          OMNI_MYYYY.DAT FORMAT DESCRIPTION
+  Logical record = 82 characters + CR/LF
+WORD  FORMAT FILL Value   MEANING                     UNITS/COMMENTS
+1       I4                Year                              1963, 1964, 1965, etc.
+2       I4                Decimal Day                       January 1 = Day 1
+3       I3                Hour                              0,1,...,23
+4      F7.1  9999.9       Heliographic Inertial Latitude    Degrees, +/-90
+                          of the Earth
+5      F7.1  9999.9       Heliographic Inertial Longitude   Degrees, 0-360
+                          of the Earth
+6      F6.1  999.9        BR RTN                            nanoteslas
+7      F6.1  999.9        BT RTN                            nanoteslas
+8      F6.1  999.9        BN RTN                            nanoteslas
+9      F6.1  999.9        Field Magnitude Average |B        1/N SUM |B|, nT
+10     F6.0  9999.        Bulk Flow speed                   km/s
+11     F6.1  999.9       THETA - elevation angle           Degrees
+                          of the velocity vector (RTN)
+12     F6.1  999.9       PHI- azimuth angle                Degrees
+                          of the velocity vector (RTN)
+13     F6.1  999.9        Proton Density                       N/cm^3
+14     F9.0  9999999.     Temperature                       Degrees, K
+                  DESCRIPTION OF COORDINATE SYSTEMS
+  The Heliographic Inertial (HGI) coordinates are Sun-centered and inertially
+  fixed with respect to an X-axis directed along the intersection line of the
+  ecliptic and solar equatorial  planes. The solar equator plane is inclined
+  at 7.25 degrees from the ecliptic. This direction was towards ecliptic
+  longitude of 74.367 degrees  on  1  January  1900  at  1200  UT; because of
+  precession of the celestial  equator, this longitude increases by 1.4
+  degrees/century. The Z axis  is  directed perpendicular and northward from
+  the solar equator, and the  Y-axis  completes  the right-handed set. This
+  system differs from the usual  heliographic  coordinates  (e.g.  Carrington
+  longitudes) which are fixed in the frame of the rotating Sun.
+  The RTN system is fixed at a spacecraft (or the planet). The R  axis
+  is directed radially away from the Sun, the T axis is the cross product of
+  the solar rotation axis and  the  R  axis,  and  the  N  axis is the cross
+  product of the R  and  T  axes.  At  zero  heliographic latitude, when the
+  spacecraft is in the solar equatorial plane, the N and solar rotation axes
+  are parallel.
+  --------------------------------------------------------------------------
+                 Convention for Latitude and Longitude Angles
+  --------------------------------------------------------------------------
+  Latitude  and  longitude  angles  of  solar wind plasma flow are generally
+  measured  from the radius vector away from the Sun. In all cases, latitude
+  angles  are  positive for north-going flow. The flow longitude angles have
+  been  treated differently for the near-Earth data, i.e. the OMNI, and for
+  the deep space data. The flow is positive for  the  near-Earth  data  when
+  coming from the right side of the Sun as viewed  from  the Earth, i.e.
+  flowing toward +Y from -X GSE or opposite to the  direction of planetary
+  motion. On the other hand, the flow longitudes for the deep space spacecraft
+  use the opposite sign convection, i.e. positive for flow in the +T direction
+  in the RTN system.
+  --------------------------------------------------------------------------
+Related data and directories:
+SPDF Data and Orbits Services <http://spdf.gsfc.nasa.gov/>
+-------------------------------------------
+  Acknowledgement:
+ Use of these data in publications should be accompanied by
+ acknowledgements of the
+Space Physics Data Facility(SPDF) and
+-------------------------------------------------------------------------
+SPDF Contact: Natalia Papitashvili <Natalia.E.Papitashvili@nasa.gov>
+---------------------------------------------------------------------------
+Authorizing NASA Official:  R.M. Candey, Head, SPDF, NASA Goddard Space Flight Center
+                        e-mail:  Robert.m.candey@nasa.gov
+-----------------------------------------------------------------
+___________________________________________________________________________________