Campbell CR23X Dokumentacja Pobierz pdf (Strona 169)

SECTION 10. PROCESSING INSTRUCTIONS

10-5

05: FP Offset 2 [B2]

06: FP Multiplier 3 [A3]

07: FP Offset 3 [B3]

08: FP Multiplier 4 [A4]

09: FP Offset 4 [B4]

Input locations altered: 4

*** 54 BLOCK MOVE ***

FUNCTION

Executes a "block move" of data in input

locations. Parameters specify the number of

values to move, the source, source step,

destination, and destination step. The "step"

parameters designate the increment of the

source and destination input locations for each

value that is moved. For example, a "source

step" of 2 and a "destination step" of 1 will move

data from every other input location to a

contiguous block of input locations.

PARAM. DATA

NUMBER TYPE DESCRIPTION

01: 4 Number of values to

move

02: 4 1st source location

03: 2 Step of source

04: 4 1st destination location

05: 2 Step of destination

Input locations altered: Number of values of

move

*** 55 5TH ORDER POLYNOMIAL ***

FUNCTION

Evaluate a 5th order polynomial of the form

F(X)=C0+C1X+C2X

2

+C3X

3

+C4X

4

+C5X

5

where C0 through C5 are the coefficients for the

argument X raised to the zero through fifth

power, respectively. The magnitude of the user

entered coefficient is limited to a range of

±.00001 to ±99999. Polynomials with

coefficients outside this range can be modified

by pre-scaling the X value by an appropriate

factor to place the coefficients within the entry

range. Pre-scaling can also be used to modify

coefficients which are very close to 0 to

increase the number of significant digits.

PARAM. DATA

NUMBER TYPE DESCRIPTION

01: 2 Repetitions [REPS]

02: 4 Starting input location

for X [X]

03: 4 Dest. input location for

F(X)

[F(X) or Z]

04: FP C0 coefficient [C0]

05: FP C1 coefficient [C1]

06: FP C2 coefficient [C2]

07: FP C3 coefficient [C3]

08: FP C4 coefficient [C4]

09: FP C5 coefficient [C5]

Input locations altered: 1 per repetition

*** 56 SATURATION VAPOR PRESSURE ***

FUNCTION

Calculate saturation vapor pressure (over water

SVPW) in kilopascals from the air temperature

(°C) and place it in an input location. The

algorithm for obtaining SVPW from air

temperature (°C) is taken from: Lowe, Paul R.:

1977, “An approximating polynomial for

computation of saturation vapor pressure,” J.

Appl. Meteor, 16, 100-103.

Saturation vapor pressure over ice (SVPI) in

kilopascals for a 0°C to -50°C range can be

obtained using Instruction 55 and the

relationship

SVPI = -.00486 + .85471 X + .2441 X

2

where X is the SVPW derived by Instruction 56.

This relationship was derived by Campbell

Scientific from the equations for the SVPW and

the SVPI given in Lowe's paper.

PARAM. DATA

NUMBER TYPE DESCRIPTION

01: 4 Input location of air

temperature °C

[TEMP.]

02: 4 Destination input

location for saturated

vapor pressure

[VP or Z]

Input locations altered: 1

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 373 374

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