Proton
Payload Accommodations
| Proton M/Breeze M |
Payload Compartment |
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Maximum Payload Diameter (Note: Cross section of available volume is not quite circular. Available diameter is approximate.) | 3864 mm (152.1 in.) |
Maximum Cylinder Length | BR-1160: 4112 mm (161.9 in.) |
Maximum Cone Length | 3800 mm (149.6 in.) |
Payload Adapter Interface Diameter | Both separation nut (truss type) and Marmon clamp (shell type) adapters available in standard diameters, including 937 mm (37 in.), 1194 mm (47 in.), and 1666 mm (66 in.) |
Payload Integration |
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Nominal Mission Schedule Begins | New spacecraft: T–18 to 24 months |
Launch Window |
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Last Countdown Hold Not Requiring Recycling | T–70 min |
On-Pad Storage Capability | 48 h for a fueled vehicle |
Last Access to Payload | T–1.5 h through access doors |
Environment |
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Maximum Axial Load | +4.3 g |
Maximum Lateral Load | ±1.35 g g |
Minimum Lateral/Longitudinal Payload Frequency | 10 Hz/25 Hz |
Maximum Acoustic Level | 132.4 dB at 100 Hz |
Overall Sound Pressure Level | 141.4 dB |
Maximum Flight Shock | 4000–8000 g at 10 kHz, depending on separation system |
Maximum Dynamic Pressure on Fairing | 3890 Pa (800 lbf/ft2) |
Maximum Aeroheating Rate at Fairing Separatii | on 130 W/m2 (0.01 BTU/ft2/s) for late fairing separation or 9600 W/m2 (0.85 BTU/ft2/s) for early fairing separation; optimum jettison at 1135 W/m2 planned with use of additional jettison zone |
Maximum Pressure Change in Fairing | 1.5 kPa/s (0.2 psi/s) |
Cleanliness Level in Fairing | Class 100,000 (no air conditioning during 4-h erection period onto pad and 70 min before launch) |
Payload Delivery |
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Standard Orbit Injection Accuracy (3 sigma) | LEO at 200 km (108 nm) circular at 51.6 deg |
| Inclination: ±0.15 deg |
Attitude Accuracy (3 sigma) | ±5 deg, ±0.7–1.8 deg/s |
Nominal Payload Separation Rate | 0.15–0.5 m/s (0.5–1.5 ft/s) |
Deployment Rotation Rate Available | 6 deg/sec |
Loiter Duration in Orbit | More than 24 h |
Maneuvers (Thermal/Collision Avoidance) | Yes |
Multiple/Auxiliary Payloads |
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Multiple/Comanifest | Proton has carried multiple spacecraft on mission unique dispensers. For example, seven spacecraft per flight were carried for Iridium. Proton has not carried comanifested payloads for separate customers in the past, but a dual-payload fairing structure has been considered as an option for future missions. |
Auxiliary Payloads | Proton has not generally carried auxiliary payloads in the past. Availability of secondary payload opportunities is unknown. Contact ILS for more information. |