中級編１：イベント解析miniワークショップ（地上観測+Van Allen Probes衛星のデータを用いて）

平成26年度国立極地研究所研究集会	

「太陽−地球大気の地上多点観測データ総合解析ワークショップ」	

2013年8月20日

於 国立極地研究所	

!

ERGサイエンスセンターチーム	

名古屋大学太陽地球環境研究所

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Contents
2012年8月に打ち上げられたVan Allen Probes衛星の科学データを、SPEDASを用いて可視化・解析する手法について紹介します。ここでは、具体的なイベントとして SCOSTEP/VarSITIのキャンペーンイベントの一つである 2013年3月17日に起きた磁気嵐を対象とします。	

• おしらせ	– ERGWATについて	

• セットアップ	– Load procedures for Van Allen Probesをダウンロードする	» https://github.com/spedas-j/member_contrib/tree/master/rbsp_tool	!

• 解説と解析	– VA Probes用のload proceduresの解説と実行（EMFISIS, ECT/MagEIS, ECT/HOPE）	

– SPEDASによる太陽風/地磁気データのプロット	– CEFを用いたVA Probesの軌道、地上観測との対応関係の確認（CEFを使用）	

– ERG連携地上観測データ（SuperDARN、地磁気）の可視化、VA Probesデータとの比較

Load procedures to download
spedas-j on GitHub 	

https://github.com/spedas-j/member_contrib/
tree/master/rbsp_tool	» rbsp_load_emfisis_hfr.pro 	» rbsp_load_emfisis_wfr.pro	

» rbsp_load_ect_mageis.pro 	» rbsp_load_ect_hope.pro	

» rbsp_load_crib.pro

The Van Allen Probes
Launch: 4:05 EDT on Aug. 30, 2012
Commissioning phase: through Oct. 27, 2012
Science operation: after Oct. 27, 2012
• Orbit: ~600 km x 5.8 Re• Inclination: ~10 deg., |MLAT| < 20˚• Lapping rate: 4 – 5 laps/year!

More detail at– http://nasa.gov/rbsp, http://vanallenprobes.jhuapl.edu/index.php, YouTube– Agendas and presentations (incl. focused science
topics & inter-mission collaborations) at SWG
meetings available at the JHU/APL website.
– Instrument papers are available for FREE in Space
Science Reviews.
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RBSP instruments[Mauk 2009 AGU talk]•Measurements:– Ions (20 eV to 75 MeV, withcomposition 20 eV to 300 keV)
– Electrons (20 eV to >10 MeV +50 to 2000 MeV)
– DC electric (to 10 Hz) andmagnetic (to 30 Hz) fields– Wave E and B fields (10 Hz to 12kHz, 1-D E to 400 kHz)6

B vector in UVW

B vector inGSE, GSM, SM

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EMFISIS fluxgate magnetometer data
(4 sec, 1 sec, and 64 Hz)
rbsp_load_emfisis.pro is available in the TDAS bleeding edge. 	

IDL> timespan, '2013-03-17', 1, /days!
1-sec data in SM coordinates
IDL> rbsp_load_emfisis, level='l3', cadence='1sec',coord='sm', probe='b'
4-sec data in GSM coordinates
IDL> rbsp_load_emfisis, level='l3', cadence='4sec',coord='gsm', probe='b'!
64-Hz data in GSM coordinates	

IDL> rbsp_load_emfisis, level='l3', cadence='hires', 	coord='gsm', probe='b'	!
See details in ERGプロジェクトTDASツールマニュアル 	 ★同時に軌道データも読み込まれるので、例えば、!
available at http://ergsc.stelab.nagoya-u.ac.jp/analysis/

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tplot, var_label=‘rbspa_emfisis_l3_4sec_sm_coordinates’とすると時刻の下に軌道情報が表示される。

EMFISIS: Data access (Wave spectra CDF files)

PNG Walk (Java)
with links toautoplot

9EMFISIS: Wave power spectra HFR(>10 kHz)rbsp_load_emfisis_hfr.pro is prepared by ERG-SC, available at spedas-j on GitHub. 	

IDL> timespan, '2013-03-17', 1, /days
IDL> rbsp_load_emfisis_hfr, probe=‘b’, datatype = ‘spectra’for Survey data (rbsp-b_HFR-spectra_emfisis-L2_YYYYMMDD_v?.?.?.cdf)!
IDL> rbsp_load_emfisis_hfr, probe=‘b’, datatype = ‘spectra-merged’ 		 for Survey + burst data (rbsp-b_HFR-spectra-merged_emfisis-L2_YYYYMMDD_v?.?.?.cdf

10EMFISIS: Wave power spectra WFR(a few Hz - 10 kHz)rbsp_load_emfisis_wfr.pro is prepared by ERG-SC, available at spedas-j on GitHub. 	

IDL> timespan, '2013-03-17', 1, /days
IDL> rbsp_load_emfisis_wfr, probe=‘b’, datatype = ‘spectra’ (for Survey data)(rbsp-b_WFR-spectral-matrix-diagonal_emfisis-L2_YYYYMMDD_v?.?.?.cdf)!
IDL> rbsp_load_emfisis_wfr, probe=‘b’, datatype = ‘spectra-merged’ (for Survey and burst data)	

(rbsp-b_WFR-spectral-matrix-diagonal-merged_emfisis-L2_YYYYMMDD_v?.?.?.cdf)

11ECT: Data access (QL & autoplot)

12ECT: Data access(autoplot)

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ECT/HOPE: Lev-2 data
- FESA > Spin-Averaged Differential Electron Flux	- FPSA > Spin-Averaged Differential Proton Flux	- FHESA > Spin-Averaged Differential Helium Flux	- FOSA > Spin-Averaged Differential Oxygen Flux	- FEDU > Uni-directional Differential Electron Flux	

- FPDU > Uni-directional Differential Proton Flux	- FHEDU > Uni-directional Differential Helium Flux	- FODU > Uni-directional Differential Oxygen Flux	!
rbsp_load_ect_hope.pro is prepared by ERG-SC, available at spedas-j on GitHub. 	

IDL> timespan, ‘2013-03-17’, 1
IDL> rbsp_load_ect_hope, probe=‘b’, /spin_avg
for spin-averaged flux data (rbspb_rel02_ect-hope-sci-L2SA_20130317_v?.?.?.cdf)
IDL> rbsp_load_ect_hope, probe=‘b’		 for uni-directional flux data (rbspb_rel02_ect-hope-sci-L2_20130317_v?.?.?.cdf)
14ECT/MagEIS: Lev-2 data- FESA > Spin-Averaged Differential Electron Flux	- FPSA > Spin-Averaged Differential Proton Flux	- FEDU > Uni-directional Differential Electron Flux	

- FPDU > Uni-directional Differential Proton Flux	!
rbsp_load_ect_mageis.pro is prepared by ERG-SC,
available at spedas-j on GitHub. 	

IDL> timespan, ‘2013-03-17’, 1
IDL> rbsp_load_ect_mageis, probe=‘b’
for flux data (rbspb_rel02_ect-mageisL2_20130317_v?.?.?.cdf)	

!
!
!
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Solar wind and geomagnetic indices
Solar wind data, SYM-H, etc. 	

IDL> omni_hro_load	

!

Dst 	

IDL> kyoto_load_dst	!

AE	IDL> kyoto_load_ae

Ground-based observations• Check conjunctions with Conjunction Event Finder(http://ergsc.stelab.nagoya-u.ac.jp/analysis/cef/)