Table 2. Spectral Parameters Used to Represent CRISM Data in This Paper

Name	Parameter	Formulationa	Rationale
R770	Corrected 0.77-mum I/F	R770	Reference surface reflectance
BD530	0.53-mum band depth	1 - (R530/(a*R709 + b*R440))	Ferric minerals, especial nanophase ferric oxide and hematite
SH600	Inflection at 0.6 mum	R600/(a*R530 + b*R709)	Dust coatings on dark substrate or compacted dust [Fischer and Pieters, 1993]
BDI1000VIS	1-mum integrated band depth measured at < 1.0 mum	divide R830, R860, R890, R915 by peak R between 0.60 and 0.83 mum, then integrate over (1 - normalized radiances) to get integrated band depth	1-mum absorption due to olivine or pyroxene; also sensitive to crystalline ferric minerals
BDI1000IR	1-mum integrated band depth measured at > 1.0 mum	divide R1030, R1050, R1080, R1150 by linear continuum fit between 1.3 and 1.87 mum and R2530, then integrate over (1 - normalized radiances) to get integrated band depth	1-mum absorption due to olivine or pyroxene; also weakly sensitive to dust
IRA	Corrected 1.33-mum I/F	R1330	Reference surface reflectance
OLINDEX	Olivine index	(R1695/(0.1*R1050 + 0.1*R1210 + 0.4*R1330 + 0.4*R1470)) - 1	Olivine and Fe-containing phyllosilicate
LCPINDEX	Low-Ca pyroxene index	((R1330 - R1050)/(R1330 + R1050)) * ((R1330 - R1815)/(R1330 + R1815)	Pyroxene, favoring low-Ca pyroxene
HCPINDEX	High-Ca pyroxene index	((R1470 - R1050)/(R1470 + R1050)) * ((R1470 - R2067)/(R1470 + R2067)	Pyroxene, favoring high-Ca pyroxene
ISLOPE1	IR spectral slope	(R1815 - R2530)/(2530 - R1815)	Same as SH600
BD1900	1.9 micron H2O band depth	1 - (((R1930 + R1985)*0.5)/(a*R1875 + b*R2067)	Bound H2O in most minerals
BD2100	2.1 micron shifted H2O band depth	1 - (((R2120 + R2140)*0.5)/(a*R1930 + b*R2250))	Bound H2O in monohydrated sulfates
BD2210	2.21 micron Al-OH band depth	1 - (R2210/(a*R2140 + b*R2250))	Al-OH and Si-OH bonds in glass and phyllosilicate
D2300	2.3 micron dropoff	1 - (R2290 + R2330 + R2330)/(R2140 + R2170 + R2210)	Mg-OH and Fe-OH bonds in phyllosilicate
SINDEX	Detects convexity at 2.29 mum due to absorptions at 1.9-2.1, 2.4 mum	1 - (R2100 + R2400)/(2 * R2290)	Hydrated minerals
IRR2	IR ratio 2	R2530/R2210	Spectral slope at 2.2-2.5 mum
BD3000	3-mum H2O band depth	1 - (R3000/(R2530*(R2530/R2210)))	Bound H2O and OH


aValues beginning with R are used to represent atmospherically and photometrically corrected I/F at a given wavelength in nanometers.