TNAG-2109-FCO40-3008-Outer-Space-Act-1986-extension-to-Hong-Kong-1990 — Page 113

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!

The

specifications performance

and functional system's outlined in the following sections.

5.1

5.2

System Timing

are

in the

shall system

with the

such as

be

performed

requirements

ranging

or

to for satellite

a the

Event timing precision commensurate

of operations processing of commanding but shall be no less than 0.5 seconds.

Real-Time Data Acquisition

form suitable

control the

Software shall be included in the system to appropriate GCE units and to collect and package data in a

and storage, suitable for display,

any processing stationkeeping or satellite necessary for

performance analysis. The data shall be identified by data type and satellite and shall be time-tagged (year, month, day, hour, minute, second, UTC). All data conversions from raw form to engineering units shall be in systeme internationale d'unites (SI) metric units. The operation of the data acquisition system shall be under operator control and will allow the operator to independently initiate or terminate

each data acquisition

collection

for

to set

appropriate, archiving of data.

5.2.1 PCM Telemetry Data

The

include

type

of rates

software

to

data

and,

for storage

where

and

from accept data

and to read and Data from each telemetry

system shall telemetry decommutator (Section 4.2.4); synchronize the telemetry data. frame shall be processed.

the

archiving

compression

for controlled

telemetry

to

be data

There shall be a facility, under operator control,

to parameters specify

be utilized during telemetry stream processing. These parameters shall govern

archive of

data based upon archive deltas) and shall (i.e. significant change separately

each analogue telemetry word. All changes in satellite status shall be archived. The capability for a periodic (e.g. 2 hour) archival telemetry data shall be incorporated to ensure that slowly The archiving strategy changing parameters are recorded.

the satellite shall be

be such that a complete record of the history can be created while minimizing the amount of data to be processed and stored by the system.

Each

time-tagged

and the

of

source

be shall record data identified so that the significance of all data words can be determined. There shall be provision for converting all

telemetry data from

units to analogue

raw telemetry engineering unita. In addition, there shall be software to check analogue data values against upper and lower limits

the limits to control, set under operator

to

be

be

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