予稿集 p.124-125

P- 37
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Initial results of the Laser Altimeter onboard KAGUYA (SELENE)
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Seiichi Tazawa, Hiroshi Araki, Hirotomo Noda, Nobuyuki Kawano, Sho Sasaki
789:;<=>? @ABCD
National Institutes of Natural Sciences, National Astronomical Observatory of Japan
EFGH%I!J
Teiji Kase, Shigeru Murata
KLMNOPQR
NEC Corporation
ABSTRACT
The Laser Altimeter is one of the instruments on board KAGUYA (SELENE) main orbiter, and measures the distance
from the main orbiter to the lunar surface. KAGUYA was launched by the H-IIA F13 Launch Vehicle at 10:31:01 a.m.
on September 14, 2007 (JST) from the Tanegashima Space Center.
The LALT measured the altitude on November 25 for the first time after sensitivity adjustment of receiver system.
The LALT started nominal observation on December 30, 2007. We will report the performance of the hardware and the
status of data acquisition.
1.
d•^ƒVødµ|ùúû“t”›\üò%cde
STUV
WXYZ;<[\=>]^_`abcdefg
hSELENEiS 2007 j 9 ^ 14 K 10 k 31 l 01 mV
nopWXqrstuv H-IIA wxyz 13 {=V|
}~•€•‚%^ƒ•„…† 100km%‡ˆ‰Š‹ 90
…]‡ˆVŒ•Ž‚••
cdefgV‘’Ž‚•“t
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•^ƒ—˜]™šh„…i›œ•žŸ ¡˜¢v%
@ABCD RISE ^£¤¥w¦§¨z©ª«V=¬
-®¯u°±ts²³›´µ|¶Ÿ•
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®ò%ùúû/ 17nsec%ùúû0-ú1t100mJ%
2v3ò4…éHz ˜¢Ÿ•')5t6]78/S
0.4mrad ˜¢v%9: 73mm ];<“=P>?@A
B›Cò')Ž‚Ÿ•()S9: 100mm ]DqE
“rPFü@AB›®¶%Si-APD ˜()žŸ•()
G*S 1mrad ˜¢Ÿ•Figure 1 VcdefgÕ>ý
Vßvï¶|¶Ÿ LALT ›Hž•
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2.
JAXA/SELENE
“t”„…•÷¸
LALT S^_`‡ˆ•›-´žŸ·abcdefg
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Figure 1
The LALT onboard SELENE
3.
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‡ˆ•˜SI`Vl&|=JKLMN›´µ••
Table 1 V‡ˆ•˜´µ•âç=JKL$O›Hž•
LALT S 2007 j 9 ^ 23 KV^PQ‡ˆ•˜}~•
€ôSTU|MR›Œ•ò%SÚMT%MU%V…%
Wtsþÿ=J]XÃY›KLò•hZý[T=J
KLi
•2007 j 11 ^ 1 KV^_`‡ˆ•˜\Ì$…
Zý[T=JKL›´µ•ô%2007 j 11 ^ 24]25
KVZý„T=JKL›´¶%“t”\^®]„T
MR%“t”\ü=J%¯u°œ™=J©_"˜¢
lon: 63.0 W
ŸæÕ›KLò••„TMR]`TSaMVbcò
Ê©•dKá•d& 0V d• 2.5kVhe,fÏMTi
lon: 60.9 W
!"#$%&$#'&()$#*+$%,&-#.+/+"+*
0++12334445)1/5".%$5*'"3%*.6"%7*.38$17$+$)693
—˜g5V`Tò••
„T=JKLk]cdefg]‡ˆ› Figure 2 V%
Figure 2
œ™=JKL˜ßÔò•±ts› Figure 3 VHž•
Trajectory of the KAGUYA main
orbiter over the Pythagoras crater
hKcdefgSisjkû¨“tsh63.5N, 63.0W
ïði•Z›Cv%l… 60.9mW ]œ™˜S¨“t
sÙÚ]ìnÊÚl›Cµ|¶Ÿ©%† 4 kêô]
l… 63.0mW ]œ™˜Sªop]„…¥wqrsú
›ßÔžŸt©fu••ªopŠƒ]‰ŠS±ts
d•† 25 …˜¢v%„…† 100km ˜ 25 …—˜]v
ʉŠÅ]œ•\wJ˜¢ŸæÕ›xyžŸ±ts
›ßÔò••—•hK]œ™Èz{S 98.6%hÒÓ
yzI 8004 V|ò%œ™ÈzI 7892i˜¢v%„
¶K{˜±ts›ßԘɟæÕ©˜É••
Table 1
Initial check out of the LALT
Date
Ù}
~•
2007/9/14
def}•€
MR OFF
Zý[T=JKL
[TMR
h^PQ‡ˆ•i
WtsKL
Zý[T=JKL
[TMR
h^_`‡ˆ•i
WtsKL
2007/9/23
2007/11/1
2007/11/24, 25
2007/12/11, 12
2007/12/21
Zý„T=JKL
€rwt±•rE
‚ÖƒÇKL
„TMR
“t”KL
Ã=¬ ON
Figure 3
def•"-®[„
Topographic profiles of the
Pythagoras crater
4.
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…˜±ts‡Ô©wJ˜¢ŸæÕ›KL˜É••
cd
efgSˆ‰%†djê] Extend ÑyÒÓrVø&
•Š‹Œ•©Ž•˜¶Ÿ•
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