Voyager Spacecraft Hardware |
Voyager Spacecraft Hardware |
Guest_PhilCo126_* |
Jan 3 2006, 06:37 PM
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#1
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Guests |
Some questions on the basic hardware of the Voyager spacecraft:
1. From which material was the decahedral space bus made ( Aluminium ? ) 2. Exact weight of the spacecraft - literature gives numbers between 792 and 825 kilograms ? Some additional questions: 1. The Deep Space Network of worldwide antenna sites wasn't sufficient to collect the faint signal of the distant spacecraft once beyond Saturn ... I know that the twenty-seven 25-meter steerable radio antennes of the Very Large Array in New Mexico were linked with DSN ... when was this done exactly? ( 1989 Neptune encounter only ? ) 2. What is the actual telecommunications time-lag 1-way to Earth (after having passed the bow-shock ) |
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May 7 2007, 07:30 AM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
The dual magnetometer set was an innovation pioneered by Mariner 10, where it would have taken a significant fraction of the very small mission budget to produce a "magnetically clean" spacecraft. The mid-way mag detects approximately the same spacecraft induced field as the outer mag, but at several times the field strength. Both instruments detect the same exterior field. As spacecaraft powere is switched on and off to different equipment, scan platforms and scanning instruments scan, etc, the difference between the two calibrates the spacecraft field component accuratly so it can be eliminated.
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Oct 26 2007, 08:50 AM
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#3
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Junior Member Group: Members Posts: 45 Joined: 18-July 05 Member No.: 439 |
Oh well... May I ask more questions?
1. The 16 hydrazine engines of Voyager -- were these all of the 0.2 lbf MR-103H type or the four TCM engines were of a larger thrust? 2. What was the initial velocity of V2 and V1 after separation with the Star 37E kick-up motor? |
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Jul 22 2009, 07:36 PM
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#4
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Junior Member Group: Members Posts: 45 Joined: 18-July 05 Member No.: 439 |
The 16 hydrazine engines of Voyager -- were these all of the 0.2 lbf MR-103H type or the four TCM engines were of a larger thrust? Well, replying to myself. Per Voyager Backrounder, Voyager Mission Module has 16 x 0.2 lbf thrusters, four for trajectory corrections and 12 (in two redundant branches) for attitude control. I guess these are of MR-103 family; which version exactly? Then, Voyager Propulsion Module has 4 larger thrusters for pitch and yaw control, these were 100 lbf items of MR-104 family -- which excactly? -- and 4 smaller ones for roll control with a thrust of 5 lbf. I couldn't find the designation for these. |
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