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PSP FIELDS Merged Searchcoil Magnetometer, SCM, and Magnetometer, MAG, (SCAM) Waveform, Level 3 (L3), 7 s Data

https://doi.org/10.48322/baqw-yt37

2025-12-04 13:30:20Z

PSP FIELDS Merged Search Coil Magnetometer and Fluxgate Magnetometer (SCaM), SCaM data.
Merged SCaM data is composed of SCM and MAG data from the FIELDS experiment on the Parker Solar Probe spacecraft [1]. For a full description of the FIELDS experiment, see [2]. The SCM is sampled by the Digital Fields Board (DFB), discussed in ref. [3]. For an overview of FIELDS/MAG calibration see ref. [4].
SCaM data consists of continuous time-series data from the SCM and MAG sensors. Merged SCaM data is a Level 3 (l3) product derived from the direct sum of weighted and time corrected l1 MAG and SCM data [4]. The weighting coefficients are designed to optimize the SCaM signal to the integrated instrumental noise floor.
The Level 3 SCaM product uses SCM data which has been calibrated for (i) DFB in-band gain, (ii) DFB analog filter gain/phase response, (iii) DFB digital filter gain/phase response, and (iv) the SCM preamplifier gain/phase response. The SCM data is empirically gain-matched to the MAG, with correction factors included in the metadata [4]. Information on SCM sample rate is provided at a 1 min cadence.
The Level 3 SCaM product uses orthogonalized MAG data with spacecraft zero offsets removed. Spacecraft zero offset data, along with the native MAG range and sample-rate meta-data is provided at a 1 minute cadence.
The Level 3 SCaM data product in this file may be in spacecraft coordinates (e.g. X,Y,Z), RTN coordinates (R,T,N), or SCM sensor coordinates (U,V,W). For large parts of the PSP mission, anomalous performance of the SCM sensor-X axis (in the U direction) precludes merging in SC or RTN coordinates. In these cases data is only provided for the SCM sensor coordinate system (V,W).
References:

1. Fox, N.J., Velli, M.C., Bale, S.D. et al. Space Sci Rev (2016) 204: 7. https://doi.org/10.1007/s1121401502116
2. Bale, S.D., Goetz, K., Harvey, P.R. et al. Space Sci Rev (2016) 204: 49. https://doi.org/10.1007/s1121401602445
3. Malaspina, D.M., Ergun, R.E., Bolton, M. et al. (2016) JGR Space Physics, 121, 5088-5096. https://doi.org/10.1002/2016JA022344
4. Bowen, T.A., Bale, S.D., Bonnell, J.W., Dudok DeWit, T. et al. (2020) JGR Space Physics, https://doi.org/10.1029/2020JA027813

Please acknowledge the Principal Investigator S. D. Bale for use of the Data

Online

Open

CDF

None

Please acknowledge the Principal Investigator S. D. Bale. Please acknowledge the Data Providers and CDAWeb when using these Data.

Online

Open

CSV

Please acknowledge the Principal Investigator S. D. Bale. Please acknowledge the Data Providers and CDAWeb when using these Data.

PT7S

Epoch Time, TT2000, SCAM Waveform Data

epoch

Epoch Time Tags in Terrestrial Time 2000, TT2000, for Search Coil and Fluxgate Magnetometer Waveform Data

This Parameter exhibits an increasing Monotonic Progression

ns

1.0e-9>s

2010-01-01T00:00:00.000000000

2050-01-01T00:00:00.000000000

9999-12-31T23:59:59.999999999

psp_fld_l3_merged_scam_wf_uvw

Time series defined by using: epoch

psp_fld_l3_merged_scam_wf_uvw

L3 Magnetic Field from Merged MAG and SCM in SCM sensor (uvw) coordinates

PT7S

nT

-65536.0

65536.0

-1.0e+31

Magnetic Field Vector, Merged Search Coil and Fluxgate Magnetometer, Spacecraft coordinates, L3 data

Time series defined by using: epoch

psp_fld_l3_merged_scam_wf_SC

Magnetic Field Vector, from Merged Search Coil Magnetometer, SCM, and Fluxgate Magnetometer, MAG, Spacecraft, SC, coordinate, Level 3 data

PT7S

nT

1.0e-9>T

psp_fld_l3_merged_scam_wf_RTN

Time series defined by using: epoch

psp_fld_l3_merged_scam_wf_RTN

L3 Magnetic Field from Merged MAG and SCM in RTN coordinates

PT7S

nT

-65536.0

65536.0

-1.0e+31

Frequency Array, Search Coil and Fluxgate Magnetometer Noise Floor data

f_noise

Frequency Array for Search Coil, SCM, and Fluxgate Magnetometer, MAG, Noise Floor data

This Parameter exhibits an increasing Monotonic Progression

Hz

0.0

293.0

-1.0e+31

Trace Noise Floor, Fluxgate Magnetometer, Range 0

Time series defined by using: f_noise

mag_trace_noise_floor

Trace Noise Floor for Fluxgate Magnetometer, MAG, Range 0, data

PT7S

nT^2/Hz

1.0e-18>T^2/Hz

1.432e-05

7.883e-05

Trace Noise Floor, Search Coil Magnetometer, High Gain

Time series defined by using: f_noise

scm_trace_noise_floor

Trace Noise Floor for Search Coil Magnetometer, SCM, High Gain, HG, data

PT7S

nT^2/Hz

1.0e-18>T^2/Hz

3.173e-08

0.00206

Meta-Data Timestamp, SCAM

meta_epoch

Meta-Data Timestamp, Time Base for combined Search Coil Magnetometer, SCM, and Fluxgate Magnetometer, MAG, data, 1 s cadence

This Parameter exhibits an increasing Monotonic Progression

ns

1.0e-9>s

2010-01-01T00:00:00.000000000

2050-01-01T00:00:00.000000000

9999-12-31T23:59:59.999999999

Sample Rate for DFB, SCM, HG Data

Time series defined by using: meta_epoch

psp_fld_l3_merged_scam_scm_sample_rate

Sample Rate assigned to Digital Filter Bank, DFB, Search Coil Magnetometer, SCM, High Gain, HG, Data

PT7S

s^-1

1.144

18750.0

-1.0e+31

Sample Rate for MAGo Data

Time series defined by using: meta_epoch

psp_fld_l3_merged_scam_mag_sample_rate

Sample Rate assigned to Digital Filter Bank, DFB, Outboard Fluxgate Magnetometer, MAGo, Data

PT7S

s^-1

1.144

18750.0

-1.0e+31

Reaction Wheel Frequencies

Time series defined by using: meta_epoch

psp_fld_l3_merged_scam_rxn_whl

Reaction Wheel Frequencies, from Spacecraft Housekeeping

PT7S

Hz

0.0

512.0

-1.0e+31

Outboard Fluxgate Magnetometer Sample Range setting

Time series defined by using: meta_epoch

psp_fld_l3_merged_scam_mag_range

Outboard Fluxgate Magnetometer, MAGo, Sample Range setting, Range values: [0,1,2,3]

PT7S

0.0

4.0

-1.0e+31

Fluxgate Magnetometer Zero Offsets, Spacecraft coordinates

Time series defined by using: meta_epoch

psp_fld_l3_merged_scam_mag_offset_SC

Fluxgate Magnetometer, MAG, Zero Offset values, Spacecraft, SC, Cartesian coordinates, [u,v,w]

PT7S

nT

1.0e-9>T

Search Coil Magnetometer Gain match to Fluxgate Magnetometer Coefficients

psp_fld_scm_gain_match

Search Coil Magnetometer, SCM, Gain match to Fluxgate Magnetometer, MAG, Coefficients

0.0

10.0

-1.0e+31

Epoch Time, TT2000, FIELDS Data Quality Flags

epoch_quality_flags

Epoch Time Tags in Terrestrial Time 2000, TT2000, for FIELDS Instrument Suite Data Quality Flags

This Parameter exhibits an increasing Monotonic Progression

ns

1.0e-9>s

2010-01-01T00:00:00.000000000

2050-01-01T00:00:00.000000000

9999-12-31T23:59:59.999999999

quality_flags

Time series defined by using: epoch_quality_flags

psp_fld_l2_quality_flags

FIELDS quality flag

FIELDS quality flags. This is a bitwise variable, meaning that multiple flags can be set for a single time, by adding flag values. Current flagged values are: 1: FIELDS antenna bias sweep, 2: PSP thruster firing, 4: SCM Calibration, 8: PSP rotations for MAG calibration (MAG rolls), 16: FIELDS MAG calibration sequence, 32: SWEAP SPC in electron mode, 64: PSP Solar limb sensor (SLS) test. 128: PSP spacecraft is off umbra pointing. 256: High frequency noise affecting RFS and TDS receivers. 512: Antennas driven towards the FIELDS power supply rails. A value of zero corresponds to no set flags. Not all flags are relevant to all FIELDS data products, refer to notes in the CDF metadata and on the FIELDS SOC website for information on how the various flags impact FIELDS data. For more information on the quality flags describing high frequency noise and antennas driven to the rails, see release notes for PSP/FIELDS releases 8 and 9. Additional flagged items may be added in the future.

PT7S

0

255

4294967295

FIELDS Data Quality Flags

Time series defined by using: epoch_quality_flags

psp_fld_l3_quality_flags

FIELDS Instrument Suite Data Quality Flags

FIELDS quality flags. This is a bitwise variable, meaning that multiple flags can be set for a single time, by adding flag values. Current flagged values are: 1: FIELDS antenna bias sweep, 2: PSP thruster firing, 4: SCM Calibration, 8: PSP rotations for MAG calibration (MAG rolls), 16: FIELDS MAG calibration sequence, 32: SWEAP SPC in electron mode, 64: PSP Solar limb sensor (SLS) test. 128: PSP spacecraft is off umbra pointing. A value of zero corresponds to no set flags. Not all flags are relevant to all FIELDS data products, refer to notes in the CDF metadata and on the FIELDS SOC website for information on how the various flags impact FIELDS data. Additional flagged items may be added in the future.

PT7S

0

255

4294967295