Page 9 - test

Ref : CM-DFH4-2014-1
BEAZLEY Issue : 1

DFH 4 Series Spacecraft Date : 28 Sept 2014
Page 7 of 38

5. OVERVIEW & PROGRAMMATIC ASSESSMENT

In the following paragraphs, an overview is given followed by a section “programmatic assessment” and then an
assessment for each of the four spacecrafts.
For clarity and to ease the reading, the evaluation assessment will be done on a tabular format. When possible for each
item, the criticality will be provided using a colour code defined as indicated below. For insurance purpose, it is difficult
to judge / assess the criticality at this stage of the program, therefore this view is only the view of an independent reader
and it is clear that some other persons or readers of this document can have a different view on the criticality. The
analysis and criticality are mainly based on the in orbit risk evaluation. The development and schedule are not really
considered but just reviewed to get assurance that the necessary flow and test sequences are implemented in order to get
confidence before launch.

Criticality Signification for the purpose of this document
 Can be considered as critical, as this stage of the
program, and maybe there is need for discussion
/ clarification.

 Items in between, where as it is difficult to do an
assessment based on the documentation
provided. Could become green or red after
further review.
 No major issue identified, but does not mean that
it is perfect based on the restricted technical
information provided so far..

Table 5-a Criticality and colour code.

5.1 OVERVIEW

Based on the documentation provided (REF1 to REF6) there is two ways to look at it:
 The presentations (by itself) can be qualified as “professional” and seems to correspond to the “industry
standard” for telecommunications satellites presentation to insurances.
 The documents are well written, well structured, and described a “marvelous situation stating that: “everything
is fine, everything is qualified, no change in comparison with what has been qualified or which is flying, well
within the design capability, modifying the frequency band of a Rx is minor, a battery design used on Leo orbit
is considered as qualified for GEO orbit etc...” As any Prime knows such ideal world doesn’t exist as such.
Although one can be sure that they will be able to develop, built (making use of equipment really flight
qualified) and test such satellites for classical Ku band C bands satellites. With perhaps some limited schedule
slippage. This will be far more difficult for the completely new satellites (Ka band, electrical propulsion etc) bu
they will be facing as every Prime difficulties that they don’t underline (or hide?). These new technology should
be well proven first before they are used for a commercial satellite.. The document as provided don’t
demonstrate the proper mastering of these new technologies to apply them on a commercial satellite. Moreover
they add some further complexity in adding on Chinasat 16 a laser peggy back payload !! Hence the comments
embedded in this document will remain at very top level and will generate some question mark on the feasibility

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