Lessons Learned From the Clementine Mission (Chapter 2, Table 2.1)

Lessons Learned From the Clementine Mission

2
Clementine and Lunar Science

TABLE 2.1 Characteristics of Clementine's Instruments

Ultraviolet-
Visible Imager Star
Tracker Near-
Infrared Imager Long-wave
Infrared Imager High-
Resolution Imager Lidar
Receiver^a Lidar
Transmitter^b

Focal plane array Thomson
CCD^c Thomson
CCD Amber
InSb^c Amber
HgCdTe^c Intensified
CCD Si APD^c

Pixel format 384 x 288 384 x 576 256 x 256 128 x 128 384 x 288 Single cell

Pixel size (痠) 23 x 23 23 x 23 38 x 38 50 x 50 23 x 23 0.5 mm²

Clear aperture (mm) 46 14 29 131 131 Shared with high-
resolution imager 38

Focal length (mm) 90 17.5 96 350 350 Shared with high-
resolution imager 99

Field of view (degrees) 5.6 x 4.2 28 x 43 5.6 x 5.6 1.0 x 1.0 0.4 x 0.3 0.057

Resolution per pixel
(arc sec) 52.6 x 52.6 262.4 x 268.9 78.8 x 78.8 28.1 x 28.1 3.6 x 3.6 205.2

Filter bandpass (nm) 415 20
750 5
900 15
950 15
1000 15
500 to 1000 400 to 1100 1102 30
1248 30
1499 30
1996 31
2620 30
2792 146 8.0 to 9.5 415 20
560 5
650 5
750 10
400 to 800
Opaque 0.4 to 1.1 1.064 and
0.532

Integration times (ms) 0.2 to 733 0.2 to 773 11, 33, 57, 95 0.144, 1.15,
2.30, 4.61 0.2 to 773

Gains 150, 350, and
1000 e/bit^c 75, 150, and
350 e/bit 0.5 to 36x 0.5 to 36x 150, 350, and
1000 e/bit 100x

Offsets (bits) 5 5 8 8 5 None

Power (W) 4.5 4.5 11.0 13.0 9.5 (Housed in high-
resolution imager) 6.8 at 1 Hz;
2.6 quiescent

Weight (kg) 0.410 0.290 1.920 2.100 1.120 (Housed in high-
resolution imager) 1.250

^aThe A/D resoultion of the lidar receiver was 14 bits (40 m per bit), whereas all of the cameras had a resolution of 8 bits.

^bThe laser used for the lidar was an Nd-YAG that produced a pulse of radiation with a duration of <10 ns. At a wavelength of 1.064 痠, the pulse has energy of 171 mJ and a divergence of <500 皴ad. At a wavelength of 0.532 痠, the pulse has an energy of 9 mJ and a divergence of 4 mrad.

^cAbbreviations and acronyms are defined in the glossary.

SOURCE: As reported by the mission and science teams. See S. Nozette et al., "The Clementine Mission to the Moon: Scientific Overview," Science 266:1835-1839, 1994; and A.S. McEwen and M.S. Robinson, "Mapping of the Moon by Clementine," Advances in Space Research, 1997, in press.

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	Ultraviolet- Visible Imager	Star Tracker	Near- Infrared Imager	Long-wave Infrared Imager	High- Resolution Imager	Lidar Receiver^a	Lidar Transmitter^b

Focal plane array	Thomson CCD^c	Thomson CCD	Amber InSb^c	Amber HgCdTe^c	Intensified CCD	Si APD^c
Pixel format	384 x 288	384 x 576	256 x 256	128 x 128	384 x 288	Single cell
Pixel size (痠)	23 x 23	23 x 23	38 x 38	50 x 50	23 x 23	0.5 mm²
Clear aperture (mm)	46	14	29	131	131	Shared with high- resolution imager	38
Focal length (mm)	90	17.5	96	350	350	Shared with high- resolution imager	99
Field of view (degrees)	5.6 x 4.2	28 x 43	5.6 x 5.6	1.0 x 1.0	0.4 x 0.3	0.057
Resolution per pixel (arc sec)	52.6 x 52.6	262.4 x 268.9	78.8 x 78.8	28.1 x 28.1	3.6 x 3.6	205.2
Filter bandpass (nm)	415 20 750 5 900 15 950 15 1000 15 500 to 1000	400 to 1100	1102 30 1248 30 1499 30 1996 31 2620 30 2792 146	8.0 to 9.5	415 20 560 5 650 5 750 10 400 to 800 Opaque	0.4 to 1.1	1.064 and 0.532
Integration times (ms)	0.2 to 733	0.2 to 773	11, 33, 57, 95	0.144, 1.15, 2.30, 4.61	0.2 to 773
Gains	150, 350, and 1000 e/bit^c	75, 150, and 350 e/bit	0.5 to 36x	0.5 to 36x	150, 350, and 1000 e/bit	100x
Offsets (bits)	5	5	8	8	5	None
Power (W)	4.5	4.5	11.0	13.0	9.5	(Housed in high- resolution imager)	6.8 at 1 Hz; 2.6 quiescent
Weight (kg)	0.410	0.290	1.920	2.100	1.120	(Housed in high- resolution imager)	1.250