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CDAWeb Served Heliophysics Datasets Beginning with 'F'

FAST_HR_DCB: High-resolution Fluxgate Magnetometer data for the FAST Mission - Robert Strangeway (UCLA)

FAST_OR_SSC: Orbit parameters from SSCWeb - SSCWeb (SPDF/Goddard)

FAST_TEAMS_PA_L2: FAST TEAMS Energy-Pitch Angle Distributions - Lynn Kistler (University of New Hampshire)

FA_ESA_L2_EEB: FAST Ion and Electron Particle Distributions - J. P. McFadden (U.C. Berkeley Space Sciences Laboratory)

FA_ESA_L2_EES: FAST Ion and Electron Particle Distributions - J. P. McFadden (U.C. Berkeley Space Sciences Laboratory)

FA_ESA_L2_IEB: FAST Ion and Electron Particle Distributions - J. P. McFadden (U.C. Berkeley Space Sciences Laboratory)

FA_ESA_L2_IES: FAST Ion and Electron Particle Distributions - J. P. McFadden (U.C. Berkeley Space Sciences Laboratory)

FA_K0_ACF: FAST AC Fields - Key Parameters - C. Carlson (U.C. Berkeley)

FA_K0_TMS: FAST TEAMS - Key Parameters - C. Carlson (U.C. Berkeley)

FM_K0_KILP: FMI Kilpisjarvi: All-Sky Camera Key Parameters - K. Kauristie (Finnish Meteorological Institute)

FORMOSAT5_AIP_IDN: FORMOSAT-5, Advanced Ionospheric Probe, Ion Density - C.K. Chao (NCU)

FAST_HR_DCB doi:10.48322/86pq-hb06

Description

Calibrated fluxgate magnetometer data acquired by the Fast Auroral SnapshoT
Small Explorer (FAST). Data have been calibrated, despun, and detrended against
the International Geomagnetic Reference Field (IGRF), using IGRF coefficients
for the date of acquisition. Data are provided in several coordinate systems.
Non detrended data in spacecraft and Geocentric Equatorial Inertial coordinates
are also provided. Ephemeris data are provided.

Modification History

Initial CDF development 8/14/12
Version 1 release 03/07/13
Updated to CDF version 3.5.0 11/26/13
Version 2 release 08/18/14
Updated to CDF Version 3.6.0 6/16/15
Updated to CDF Version 3.8.0.1 8/23/20

Data Variable Descriptions

DeltaB in Despun Spacecraft Coordinates [DeltaB_DSC]

DeltaB in Despun Spacecraft Coordinates. Model Magnetic Field is IGRF version
11. Despun Spacecraft Coordinates (DSC) are defined as: z-axis along the
spin-axis; y-axis in the spin-plane, perpendicular to the Sun-direction; and x
completing the triad x-y-z. Detrended (DeltaB) data have bad data deleted,
DEL_MAG_FLAG = 1.

DeltaB in Geocentric Equatorial Inertial Coordinates [DeltaB_GEI]

DeltaB in Geocentric Equatorial Inertial coordinates. Model Magnetic Field is
IGRF version 11. Detrended (DeltaB) data have bad data deleted, DEL_MAG_FLAG =
1.

DeltaB in Solar Magnetic Coordinates [DeltaB_SM]

DeltaB in Solar Magnetic coordinates. Model magnetic field and dipole axis
direction from IGRF version 11. Detrended (DeltaB) data have bad data deleted,
DEL_MAG_FLAG = 1.

DeltaB in Field-Aligned Coordinates [DeltaB_FAC]

DeltaB in Field-Aligned Coordinates. Model Magnetic Field is IGRF version 11.
Field-Aligned Coordinates (FAC) defined as: 'b' along the model magnetic field;
'e' as East, in the direction of B-cross-R; and 'o' outwards, completing the
triad o-e-b. Near the poles 'outwards' points towards the respective north or
south pole. Detrended (DeltaB) data have bad data deleted, DEL_MAG_FLAG = 1.

DeltaB in Field-Aligned Spacecraft Coordinates [DeltaB_FAC_V]

DeltaB in Field-Aligned spacecraft coordinates. Model Magnetic Field is IGRF
version 11. Field-aligned spacecraft coordinates use the spacecraft velocity
vector (hence DeltaB_FAC_V) in specifying the coordinate system, which is
defined as: 'b' along the model magnetic field; 'p' perpendicular, in the
direction of B-cross-vel_spacecraft, that is, across track; and 'v' nominally
along the spacecraft velocity vector, along track, completing the triad v-p-b.
Detrended (DeltaB) data have bad data deleted, DEL_MAG_FLAG = 1.

DeltaB in Field-Aligned/Spin Plane Coordinates [DeltaB_FAC_SP]

DeltaB in Field-Aligned/Spin Plane Coordinates. Model Magnetic Field is IGRF
version 11. Field-aligned/spin plane coordinates use the spin plane (hence
DeltaB_FAC_SP) in specifying the coordinate system, which is defined as: 'b'
along the model magnetic field; 's' in the spin-axis cross model B direction,
that is, in the spin-plane and perpendicular to the model field; and 'p'
perpendicular (B x (spin-axis x B)), nominally along the spin-axis, completing
the triad s-p-b. The spin-plane coordinate 's' is in the same direction as the
despun electric field "E along V" component. Note that "E along V" is nominally
along the spacecraft velocity only in the northern hemisphere, and is nominally
anti-parallel to the spacecraft velocity vector in the southern hemisphere. The
"E along V" electric field crossed with the p-component of "deltaB_FAC_SP"
contributes to the field-aligned Poynting flux. In this s-p-b coordinate system,
positive field-aligned Poynting flux is into the northern ionosphere, but away
from the southern ionosphere. The other contribution to the field-aligned
Poynting flux would be from the p-component of the electric field crossed with
the s-component of the DeltaB magnetic field, but the p-component of the
electric field is mainly given by the spin-axis electric field measurement.
Because one of the axial booms did not deploy on FAST the spin-axis electric
field is generally not used. Detrended (DeltaB) data have bad data deleted,
DEL_MAG_FLAG = 1.

Full Magnetic Field in Geocentric Equatorial Inertial Coordinates [B_GEI]

Full (non-detrended) magnetometer data in Geocentric Equatorial Inertial
coordinates, with bad data deleted, indicated by DEL_MAG_FLAG = 1.

Magnetometer Deleted Data Flag [DEL_MAG_FLAG]

Flags data that have been deleted in B_GEI and detrended (DeltaB) data, or
should be deleted from the non-detrended B_DSC and B_SSC data.

Torquer Coil Field [Torquer]

Estimated torquer coil magnetic field, in spinning spacecraft coordinates. Units
are pseudo nT since field is estimated with intermediate data.

Time-Varying Tweaker Matrix [Tweaker]

Time-varying tweaker matrix that gives final orthogonalization and removes
spin-plane offsets. Tweaker takes into account on-orbit variations caused by
eclipse entry, etc..TW_ZX is used to remove from the z-sensor any spin-tone
signals in phase with the x-sensor..TW_ZY is used to remove from the z-sensor
any spin-tone signals in phase with the y-sensor..TW_YY is used to make the
y-sensor have the same gain as the x-sensor..TW_YX is used to remove from the
y-sensor any spin-tone signals in phase with the x-sensor..O_X is used to remove
any DC offsets from the x-sensor..O_Y is used to remove any DC offsets from the
y-sensor.

Magnetometer Data Quality Flag [MAG_QUAL_FLAG]

The Magnetometer Data Quality Flags are additive. Flag values 1 - 16 are Torquer
and other data processing flags. Flag values 32 - 2048 are Spin phase related
flags. Flag values 4096 and 8192 are related to calibration quality. Any data
with a flag value 2048 or greater should be used with care.  Flag values:  0   
good; 1    Torquers on; 2    Torquer ramp; 4    Nutation [TBD]; 8    Torquer
offset determined from spin plane offset; 16   Torquer offset adjusted by hand
32   spin phase object set to zero; 64   in eclipse (using nadir table); 128 
RESERVED; 256  RESERVED; 512  spin phase data not smoothed; 1024 spin phase data
patched with nadir or Mission Unique Electronics (MUE) phase data; 2048 Missing
spin phase data; 4096 Caution set in Magnetometer Calibration File; 8192 Warning
set in Magnetometer Calibration File.

Full Magnetic Field in Despun Spacecraft Coordinates [B_DSC]

Full (non-detrended) magnetometer data in Despun Spacecraft Coordinates (DSC),
with bad data included, indicated by DEL_MAG_FLAG = 1. Despun Spacecraft
Coordinates have the z-axis along the nominal spin axis, and the Sun in the x-z
plane.

Full Magnetic Field in Spinning Spacecraft Coordinates [B_SSC]

Full (non-detrended) magnetometer data in Spinning Spacecraft Coordinates (SSC),
with bad data included, indicated by DEL_MAG_FLAG = 1.

Removed Magnetic Field Spin-Tone Harmonic in Despun Spacecraft Coordinates [Bharmonic_DSC]

Magnetic field spin-tone harmonic in Despun Spacecraft Coordinates (DSC). Bad
data removed, DEL_MAG_FLAG = 1.

Spin Frequency [Spin_Freq]

Spacecraft spin frequency at the time specified by Spin_Epoch.

Spin Phase [Spin_Phase]

Phase angle of the magnetometer x-axis with respect to the Sun at the time
specified by Spin_Epoch.

FAST Orbit Number [Orbit]

Orbit number as specified by the FAST ephemeris software, together with the
other ephemeris information.

Spacecraft Position in Geocentric Equatorial Inertial Coordinates [pos_gei]

FAST spacecraft position in Geocentric Equatorial Inertial coordinates.

Spacecraft Velocity in Geocentric Equatorial Inertial Coordinates [vel_gei]

FAST spacecraft velocity in Geocentric Equatorial Inertial coordinates.

Model Magnetic Field in Geocentric Equatorial Inertial Coordinates [B_model_gei]

Model magnetic field (IGRF version 11 at the date of acquisition) in Geocentric
Equatorial Inertial coordinates.

FAST Altitude Relative to 6378.14 km [alt]

FAST altitude with respect to Earth equatorial radius (6378.14 km), not mean
radius or geodetic altitude.

FAST Geographic Latitude [lat]

FAST geographic latitude with respect to sphere with Earth equatorial radius
(6378.14 km), not geodetic.

FAST Geographic Longitude [lng]

FAST geographic longitude with respect to sphere with Earth equatorial radius
(6378.14 km), not geodetic.

FAST Invariant Latitude [ilat]

FAST invariant latitude (ILAT) calculated with respect to offset tilted dipole.
Dipole geographic position: [-402.199, 287.504, 195.908] km; Dipole orientation:
latitude 79.3637 degrees, longitude 288.454 degrees. Invariant latitude defined
using 6371.2 km radius with respect to dipole origin.

FAST Invariant Longitude [ilng]

FAST invariant longitude (ILNG) calculated with respect to offset tilted dipole.
Dipole geographic position: [-402.199, 287.504, 195.908] km; Dipole orientation:
latitude 79.3637 degrees, longitude 288.454 degrees.

FAST Magnetic Local Time [mlt]

FAST magnetic local time (MLT) calculated from ILNG, which in turn uses an
offset tilted dipole. Dipole geographic position: [-402.199, 287.504, 195.908]
km; Dipole orientation: latitude 79.3637 degrees, longitude 288.454 degrees.

FAST Magnetic Footprint Latitude [flat]

Latitude of FAST magnetic footprint at 100 km altitude (geodetic coordinates).
IGRF Version 7 used for magnetic field model (IGRF Version 7 is the default in
the field-line tracing code). Latitude is in geodetic coordinates.

FAST Magnetic Footprint Longitude [flng]

Longitude of magnetic footprint at 100 km altitude (geodetic coordinates). IGRF
Version 7 used for magnetic field model (IGRF Version 7 is the default in the
field-line tracing code). Longitude is in geodetic coordinates.

Footprint Magnetic Field in Geocentric Equatorial Inertial Coordinates [B_foot_gei]

IGRF Version 7 model magnetic field at the position specified by FLAT, FLNG, and
100 km altitude geodetic (IGRF Version 7 is the default in the field-line
tracing code).

Sun Direction in Geocentric Equatorial Inertial Coordinates [sun_dir_gei]

This unit vector is used to construct the despun spacecraft to Geocentric
Equatorial Inertial coordinate transformation. This unit vector is also used to
generate the GEI to Solar Magnetic coordinate transformation.

Dipole Orientation in Geocentric Equatorial Inertial Coordinates [dip_orient_gei]

Unit vector giving dipole orientation in Geocentric Equatorial Inertial
coordinates. Dipole specified by the g10, g11, and h11 values of the IGRF 11
model, using the center time of the orbit as the reference epoch. Used to
generate GEI to Solar Magnetic coodinate transformation.

Orbit Number [Orbit_Value]

Fixed value of the orbit number, specified at the Orbit_Fixed_Epoch time.

Coupling Matrix [Coupling_Matrix]

Magnetometer coupling matrix components, fixed values for the orbit. Coupling
matrix components can change from orbit to orbit.

Magnetometer Offsets [Offsets]

Magnetometer offsets, fixed values for the orbit. Offsets can change from orbit
to orbit.

Spin Axis Right Ascension and Declination [Spin_Axis]

Spin axis right ascension (RA) and declination (DEC), obtained by comparing IGRF
model field with data. The parameters RA_FDF and DEC_FDF are the starting values
for the initial comparison (FDF = Flight Dynamics Facility).

Spin Phase Delta [Spin_Phase_Delta]

Angle by which the measured field leads the model field in the spin-plane,
before correction. Correction is to rotate the measured field back by this
angle.

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FAST_OR_SSC

Description

GROUP 1    Satellite   Resolution   Factor
            fast           60         1
           Start Time           Stop Time 
           1996 235 00:00       2009 124 00:00   
Coord/            Min/Max   Range Filter       Filter
Component   Output Markers  Minimum  Maximum   Mins/Maxes 
GEO X        YES      -         -           -             -         -           
 -   
GEO Y        YES      -         -           -             -         -           
 -   
GEO Z        YES      -         -           -             -         -           
 -   
GEO Lat      YES      -         -           -             -         -           
 -   
GEO Lon      YES      -         -           -             -         -           
 -   
GEO LT       YES      -         -           -             -         -           
 -   
GM X         YES      -         -           -             -         -           
 -   
GM Y         YES      -         -           -             -         -           
 -   
GM Z         YES      -         -           -             -         -           
 -   
GM Lat       YES      -         -           -             -         -           
 -   
GM Lon       YES      -         -           -             -         -           
 -   
GM LT        YES      -         -           -             -         -           
 -   
GSE X        YES      -         -           -             -         -           
 -   
GSE Y        YES      -         -           -             -         -           
 -   
GSE Z        YES      -         -           -             -         -           
 -   
GSE Lat      YES      -         -           -             -         -           
 -   
GSE Lon      YES      -         -           -             -         -           
 -   
GSE LT       YES      -         -           -             -         -           
 -   
GSM X        YES      -         -           -             -         -           
 -   
GSM Y        YES      -         -           -             -         -           
 -   
GSM Z        YES      -         -           -             -         -           
 -   
GSM Lat      YES      -         -           -             -         -           
 -   
GSM Lon      YES      -         -           -             -         -           
 -   
SM X         YES      -         -           -             -         -           
 -   
SM Y         YES      -         -           -             -         -           
 -   
SM Z         YES      -         -           -             -         -           
 -   
SM Lat       YES      -         -           -             -         -           
 -   
SM Lon       YES      -         -           -             -         -           
 -   
SM LT        YES      -         -           -             -         -           
 -   
Addtnl             Min/Max      Range Filter          Filter
Options     Output Markers    Minimum     Maximum    Mins/Maxes
dEarth       YES      -         -           -             -   
MagStrgth    YES      -         -           -             -   
dNeutS       YES      -         -           -             -   
dBowSck      YES      -         -           -             -   
dMagPause    YES      -         -           -             -   
L_Value      YES      -         -           -             -   
InvarLat     YES      -         -           -             -   
Perform the following magnetic field traces:   
    North trace for GEO footpoint; Output: lat, lon, arclen.
    South trace for GEO footpoint; Output: lat, lon, arclen.
    North trace for GM footpoint; Output: lat, lon, arclen.
    South trace for GM footpoint; Output: lat, lon, arclen.
Magnetic field model:                          
    Internal: IGRF
    External: Tsyganenko 89C 
    External: Tsyganenko 89C     Kp:  3-,3,3+
    Stop trace altitude (km):   100.00
Formats and units:                          
    Day/Time format: YYYY DDD HH:MM
    Degrees/Hemisphere format: Decimal degrees with 2 place(s).
        Longitude 0 to 360, latitude -90 to 90.
    Distance format: Earth radii with 2 place(s).

Modification History

Originated 03/14/96

Data Variable Descriptions

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FAST_TEAMS_PA_L2

Description

No TEXT global attribute value.

Data Variable Descriptions

H+ Energy-Pitch Angle Distribution (spectrograms at 16 selected pitch angles) [proton_distribution]

64 solid angle bins are sorted into 16 pitch angles.  Distribution is
transformed into the plasma frame using the O+ convection velocity.

O+ Energy-Pitch Angle Distribution (spectrograms at 16 selected pitch angles) [oxygen_distribution]

64 solid angle bins are sorted into 16 pitch angles.  Distribution is
transformed into the plasma frame using the O+ convection velocity.

He+ Energy-Pitch Angle Distribution (spectrograms at 16 selected pitch angles) [helium_distribution]

64 solid angle bins are sorted into 16 pitch angles.  Distribution is
transformed into the plasma frame using the O+ convection velocity.

H+ omnidirectional energy flux vs energy in Plasma Frame [proton_omni_flux]

H+ distribution integrated over pitch angle to get omni-directional flux

O+ omnidirectional energy flux vs energy in Plasma Frame [oxygen_omni_flux]

O+ distribution integrated over pitch angle to get omni-directional flux

He+ omnidirectional energy flux vs energy in Plasma Frame [helium_omni_flux]

He+ distribution integrated over pitch angle to get omni-directional flux

Proton Flag. Non-zero values indicate that incomplete data was used [proton_flag]

This flag indicates that because of telemetry problems, there was no data for
some angular bins.  However, a full pitch angle distribution could be
constructed.  Data with nonzero flag should be used with caution.

Oxygen Flag. Non-zero values indicate that incomplete data was used [oxygen_flag]

This flag indicates that because of telemetry problems, there was no data for
some angular bins.  However, a full pitch angle distribution could be
constructed.  Data with nonzero flag should be used with caution.

Helium Flag. Non-zero values indicate that incomplete data was used [helium_flag]

This flag indicates that because of telemetry problems, there was no data for
some angular bins.  However, a full pitch angle distribution could be
constructed.  Data with nonzero flag should be used with caution.

filtered O+ Velocity in GEI in spacecraft frame [v_o_filtered_gei]

O+ Velocity in GEI in spacecraft frame

O+ Velocity in GEI in spacecraft frame [v_o_gei]

O+ Velocity in GEI in spacecraft frame

Spacecraft Velocity in GEI [v_sc_gei]

Spacecraft Velocity, GEI

Convection Velocity in GEI [v_convect_gei]

Convection Velocity in GEI derived from  O+ velocity

filtered O+ Velocity in GSE in spacecraft frame [v_o_filtered_gse]

O+ Velocity in GSE in spacecraft frame

O+ Velocity in GSE in spacecraft frame [v_o_gse]

O+ Velocity in GSE in spacecraft frame

Spacecraft Velocity in GSE [v_sc_gse]

Spacecraft Velocity, GSE

Convection Velocity in GSE [v_convect_gse]

Convection Velocity in GSE derived from  O+ velocity

filtered O+ Velocity in SM in spacecraft frame [v_o_filtered_sm]

O+ Velocity in SM in spacecraft frame

O+ Velocity in SM in spacecraft frame [v_o_sm]

O+ Velocity in SM in spacecraft frame

Spacecraft Velocity in SM [v_sc_sm]

Spacecraft Velocity, SM

Convection Velocity in SM [v_convect_sm]

Convection Velocity in SM derived from  O+ velocity

Spacecraft Potential [sc_potential]

Spacecraft Potential

Spacecraft orbit number [orbit_number]

Orbit Number

Spacecraft position in GEI coordinates [fa_pos_gei]

Spacecraft location in GEI coordinate system, XYZ

Spacecraft position in GSE coordinates [fa_pos_gse]

Spacecraft location in GSE coordinate system, XYZ

Spacecraft position in SM coordinates [fa_pos_sm]

Spacecraft location in SM coordinate system, XYZ

Spacecraft Altitude [altitude]

Spacecraft Altitude

Spacecraft Invariant Latitude [invariant_latitude]

Spacecraft Invariant Latitude

Spacecraft Invariant Longitude [invariant_longitude]

Spacecraft Invariant Longitude

Spacecraft Magnetic Local Time [mlt]

Spacecraft Magnetic Local Time

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FA_ESA_L2_EEB doi:10.48322/m36d-wr84

Description

ESA>Electrostatic Analyzer

Modification History

Rev-2 2021-09-28

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FA_ESA_L2_EES doi:10.48322/0ydx-j139

Description

ESA>Electrostatic Analyzer

Modification History

Rev-2 2021-09-28

Data Variable Descriptions

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FA_ESA_L2_IEB doi:10.48322/3chd-sj41

Description

ESA>Electrostatic Analyzer

Modification History

Rev-2 2021-09-28

Data Variable Descriptions

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FA_ESA_L2_IES doi:10.48322/9t9w-1q28

Description

ESA>Electrostatic Analyzer

Modification History

Rev-2 2021-09-28

Data Variable Descriptions

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FA_K0_ACF doi:10.48322/23b9-6g23

Description

none yet

Modification History

none yet

Data Variable Descriptions

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FA_K0_TMS doi:10.48322/78b7-gk94

Description

The Time-of-Flight Energy, Angle, Mass Spectrograph 
(TEAMS) Experiment for FAST,  D. M. Klumpar, E. Moebius, 
L. M. Kistler, M. Popecki, E. G. Shelley, E. Hertzberg, 
K. Crocker, M. Granoff, Li Tang, C. W. Carlson, 
J. McFadden, B. Klecker, F. Eberl, E. Kuenneth, 
H. Kaestle, M. Ertl, W. K. Peterson, and D. Hovestadt, 
published, Space Science Reviews, 
2001, volume 98, pages 197-291,  doi:10.1023/A:1013127607414. 
The 3-D Plasma Distribution Function Analyzers with 
Time-of-Flight Mass Discrimination for CLUSTER, FAST,and Equator-S, 
E. Moebius, L. M. Kistler, M. Popecki, 
K. Crocker, M. Granoff, Y. Jiang, E. Satori, V. Ye, 
H. Reme, J. A. Sauvaud, A. Cros, A. Aoustin, T. Camus, 
J. L. Medale, J. Rouzaud, C. W. Carlson, J. McFadden, 
D. Curtis, H. Heetdirks, J. Croyle, C. Ingraham, 
E. G. Shelley, D. M. Klumpar, E. Hertzberg, B. Klecker, 
M. Ertl, F. Eberl, H. Kaestle, E. Kuenneth, 
P. Laeverenz, E. Seidenschwang, G. Parks, M. McCarthy, 
A. Korth, B. Graeve, H. Balsiger, U. Schwab, and 
M. Steinacher, Measurement Techniques for Space 
Plasmas: Particles, 1998, Geophysical Monograph Series, 
volume 102, pages 243-248.
Data are derived from a time-of-flight mass spectrograph 
that determines 3-dimensional distribution functions of 
individual ion species over the energy range 1 - 12000 eV, 
within 2.5 seconds (one-half spacecraft spin).  The 
instrument consists of a toroidal top-hat electrostatic 
analyzer with instantaneous acceptance of ions over 360 
degrees in polar angle in 16 sectors.  Ions passing 
through the electrostatic analyzer are postaccelerated by 
up to 25 kV and then analyzed for mass per charge in a 
foil-based time-of-flight analyzer.  The data used to 
construct CDF data products are derived from the Survey 
data.  Survey data consists of 
4 mass groups x 48 energies x 64 solid angle segments. 
The 4 mass groups are H+, O+, He+, and He++.  Only the 
16 equatorial angle segments are used for the CDF data set. 
Each equatorial solid angle segment contains 2 (4) samples 
at each energy in the 32 (64) sweep/spin mode.  The full 
angular range is covered in half a spin but the actual 
time resolution of the survey data product depends upon 
the telemetry mode.  In the highest TM rate modes H+ and O+ 
survey data read out every half spin.  In lowest TM rate 
mode these data are accumulated for 4 spins.  The minimum 
accumulation time included in the CDF is 1 spin, so if the 
actual accumulation time is a half spin, two data points 
are averaged.  Otherwise, the full resolution is included. 
In every mode He+ and He++ are accumulated twice as long 
as H+ and O+.  To force the H+, O+, and He+ to have an 
equal number of data points when H+ and O+ have twice the 
time resolution, each He+ data point is written twice 
consecutively in the file.

Modification History

none yet

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FM_K0_KILP (spase://GBO/NumericalData/FMI/Kilpisjarvi/AllSkyCamera/K0/PT1M)

Description

Keograms are quick-look data of an all-sky camera at 
Kilpisjarvi (69.02 N, 20.79 E)  
 maintained and operated by the Finnish Meteorological Institute.
Keograms show the intensity along the middle meridian of the camera 
field-of-view as a function of time. The camera has a fish-eye lens 
of 180 degrees and narrow bandpass interference filters of wavelengths 
557.7 nm (green) and 630.0 nm (red). In standard operating mode, the sampling
interval 
is 20 s and 60 s for the red and green images, respectively.
The exposure time is typically 1000 ms. The time resolution of keograms 
is 1 min and they are constructed using only the green images.
The size of a digital image is 512x512 pixels and intensity values 
vary between 0 and 255. At the altitude of 110 km the field-of-view 
(with reasonable spatial resolution) is a spherical area with the 
diameter of 600 km.  The keograms shown here are intensity versus latitude 
plots while the original keograms (available in http://www.geo.fmi.fi/MIRACLE 
are intensity versus zenith angle plots.
The conversion from zenith angle dependence to equidistant latitude grid 
causes occasionally artificial two-band structure to the keograms
(light bands below and above the darker zenith).
The artefact becomes visible especially during quiet periods, 
and the autoscaling color palette may even strengthen the effect.
Note that some keograms show also the Moon as a sphere or ellipsoid with 
very high, even saturating intensities.

Modification History

CDF created 25.04.2001 06:34:32 UTC

Data Variable Descriptions

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FORMOSAT5_AIP_IDN

Description

IDN>Ion Number Density. Advanced Ionospheric Probe (AIP) is provided by Graduate
Institute of Space Science, National Central University (NCU) for the FORMOSAT-5
satellite as a scientific payload. The AIP is an all-in-one plasma sensor with
sampling rate up to 8,192 Hz to measure ionospheric plasma concentrations,
velocities, and temperatures over a wide range of spatial scales. Once a
comprehensive dataset is available from the AIP, a systematic examination of
longitudinal and seasonal variations of the ionospheric parameters in the
topside F region can be conducted for all latitudinal coverage. The transient
and long-term variations of ionospheric plasma can be monitored in the upcoming
solar maximum period and are beneficial to predict the trend of the space
weather as well as the seismic precursors associated with earthquakes.

Data Variable Descriptions

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