Simultaneous observations of pulsating aurora with CUTLASS and all-sky TV camera

PI: K. Hosokawa

Recent studies using SuperDARN radars have shown intriguing relationships 
between pulsating aurora and changes in E region auroral backscatter. On 
the one hand, regular pulsations are associated with periodic changes in 
echo Doppler shift. On the other, irregular pulsations are associated 
with a new population of low altitude (D region) backscatter echoes. 
We aim to investigate these two phenomena by comparing a specially 
designed radar sounding mode of the CUTLASS radars with simultaneous 
observations of the aurora by TV cameras and electron density measurement 
by EISCAT radar in Tromsoe.
Reimei satellite will pass over Tromsoe around 0042 UT on March 8, 
and gives information on precipitating particle energies and auroral 
structures.

Arc1 pulse code and CP-1 mode will be used for the KST UHF radar 
observations. We prefer good weather condition for the optical 
observations.


EISCAT UHF radar SP Time:
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YYYY:MM:DD-DD   UT   
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2008:03:03-04  22-02 (4 hours) tro
2008:03:03-04  22-02 (4 hours) kir (1/4)
2008:03:06-07  22-02 (4 hours) tro
2008:03:06-07  22-02 (4 hours) kir (1/4)
2008:03:07-08  22-02 (4 hours) tro
2008:03:07-08  22-02 (4 hours) kir (1/4)
2008:03:08-09  23-03:30 (4.5 hours)  tro  
               02:00-03:30 UT: UK SP (PI: M. Birch)
2008:03:08-09  23-03:30 (4.5 hours)  kir (1/4)
               02:00-03:30 UT: UK SP (PI: M. Birch)
2008:03:11-12  23-02 (3 hours) tro
2008:03:11-12  23-02 (3 hours) kir (1/4)
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19 hours in total.

Reimei conjunctions:
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2008-03-03 00:47:00 INDEX(080212)        293.1 83.7
2008-03-04 01:05:54 INDEX (20080211pm)   299.5 67.4
2008-03-05 01:24:22 INDEX (20080211pm)   302.7 54.2
2008-03-06 00:06:35 INDEX (20080211pm)   104.8 58.5
2008-03-07 00:25:02 INDEX(080212)        111.3 81.8
2008-03-08 00:43:10 INDEX(080212)        290.0 87.1
2008-03-09 01:02:09 INDEX (20080211pm)   298.1 70.6
2008-03-10 01:20:37 INDEX (20080211pm)   302.0 56.7
2008-03-11 00:02:49 INDEX (20080211pm)   104.2 55.9
2008-03-12 00:21:23 INDEX (20080211pm)   109.0 71.2
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2008-03-03 2200 UT - 2008-03-04 0200 UT (4hours)

KST UHF observation:
(21:40 UT) rem ksu runexp /kst/exp/arc1/arc1 fm cp1 SP 250
(22:00 UT) problem of power supply
(22:05 UT) rem ksu enablerec
(00:28 UT) crowber, 0kW.
(00:31 UT) recovered
(02:00 UT) rem ksu stopexp

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2008-03-06 2200 UT - 2008-03-07 0200 UT (4hours)
(21:50 UT) rem ksu runexp /kst/exp/arc1/arc1 fm cp1 SP 250
(22:00 UT) problem with transmitter
(22:08 UT) rem ksu enablerec
(23:36 UT) crawber 
(23:39 UT) fixed
(00:12 UT) change tristatic altitude (110 km)
(00:09 UT) crawber 
(00:13 UT) fixed
(02:00 UT) rem ksu stopexp

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2008-03-11 2300 UT - 2008-03-12 0200 UT (3hours)
(23:05 UT) rem kst runexp /kst/exp/arc1/arc1 fm cp1 SP 130
(23:08 UT) enablerec
(23:08 UT) kir enablerec
(23:08 UT) sod enablerec
(23:10 UT) webtg
(23:10 UT) click background to start rtg
(23:11 UT) kir webtg
(23:11 UT) sod webtg
(23:20 UT) start guisdap; > guisdap ?a
(23:42 UT) current transmitter power: 1770 kW
(23:42 UT) weak discrete arc overhead
(23:50 UT) The pulsating aurora appeared at first 10 min after starting the experiment (fm Hosokawa)
(00:10 UT) current transmitter power: 1775 kW
(00:37 UT) current transmitter power: 1758 kW
(01:06 UT) patchy aurora at the equatorward side of the zonal-expanded aurora, not moving very much.
(01:58 UT) rem kst stopexp 02:00
(02:04 UT) Exp was over.

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