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TABLE 2.1 Characteristics of Clementine's Instruments

 

Ultraviolet-Visible Imager

Star Tracker

Near-Infrared Imager

Long-wave Infrared Imager

High-Resolution Imager

Lidar Receivera

Lidar Transmitterb

Focal plane array

Thomson CCDc

Thomson CCD

Amber InSbc

Amber HgCdTec

Intensified CCD

Si APDc

 

Pixel format

384 × 288

384 × 576

256 × 256

128 × 128

384 × 288

Single cell

 

Pixel size (µm)

23 × 23

23 × 23

38 × 38

50 × 50

23 × 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 × 4.2

28 × 43

5.6 × 5.6

1.0 × 1.0

0.4 × 0.3

0.057

 

Resolution per pixel (arc sec)

52.6 × 52.6

262.4 × 268.9

78.8 × 78.8

28.1 × 28.1

3.6 × 3.6

205.2

 

Filter bandpass (nm)

415± 20

400 to 1100

1102± 30

80 to 9.5

415± 20

0.4 to 1.1

1.064 and 0.532

 

750± 5

 

1248± 30

 

560± 5

 

 

 

900± 15

 

1499± 30

 

650± 5

 

 

 

950± 15

 

1996± 31

 

750± 10

 

 

 

1000± 15

 

2620± 30

 

400 to 800

 

 

 

400 to 1000

 

2792±

146

 

Opaque

 

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/bitc

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

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

b The 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 1.064µm, the pulse has an energy of 171 mJ and a divergence of<<500µrad. At a wavelength of 0.532µm, the pulse has an energy of 9 mJ and a divergence of 4 mrad.

c Abbreviations 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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