Upper Ionosphere of Mars During Solar Quiet and Disturbed Conditions - Planetary Exploration and Science: Recent Results and Advances - page 133

a

750 55

50
40
30
20
10
0

700 36

650 13

600 16

15

550

21

500

32

450

100 150 200

Wavelength (nm)

250 300 350

b

Orbit 716
SPICAM / MEX
Nightglow light curve

400

300

Bin 1

Bin 2
Bin 3
Bin 4
Bin 5

200

100

0

200 300 400 500 600 700 800 900

Time after start (s)

Fig. 7.13 ( a ) Spectra recorded during the grazing limb observation between 450 and 750 s.
Altitudes of the Mars nearest point (MNP) of the line of sight are indicated at the right. It contains
HLyman-' emission at 121.6 nm and well-structured band (190-270 nm) of NO. The intensity in
ADU (analogue-to-digital units) per pixel is colour-coded. ( b ) Auroral peak is sharp and different
from NO spectrum. Signal intensity in ADU for five bins (each averaged from 181 to 298 nm)
as a function of time between 200 and 900 s are plotted in Fig. 7.13 (Reprinted from Haider and
Mahajan ( 2014 ) with kind permission from Springer)