Orbital Antares User Manual
Page 41
Antares
®
OSP-3
User’s Guide
Section 4.0
– Payload Environments
Release 1.1
July 2013
30
system, all which are located within the payload fairing compartment downstream of the payload, are
cleaned to visibly clean.
4.4.4. Enhanced Thermal and Contamination Services
Orbital recognizes that some payloads may have more stringent cleanliness requirements than those
provided by the Standard Launch Service. Orbital offers a variety of enhancements to address these
needs. These options are discussed in more detail in Section 8:
4.5. Thermal Environments
During launch and ascent, the acoustic blanket inner surface temperature on the cylinder portion of the
fairing remains below 93 °C (200 °F).
4.6. Pressurization Profile
Typical Antares LEO mission ascents have peak pressure decay rates less than 0.3 psi/sec. The internal
pressure at fairing jettison is typically less than 0.2 psia. Typical fairing internal pressure is shown in Fig-
ure 4.6-1. The venting characteristics are sensitive to trajectory shape and payload unvented volume.
Figure 4.6-1. Antares Fairing Internal Pressure Profile