198:
46:
On HST some parts were designed from the start as ORUs and all used captive bolts with a standard 7/16" double-height hex head; later when it was decided to avoid returning HST to Earth for repair, more systems and modules were designated as ORUs (but used a wider variety of fasteners). HST servicing
59:
243:
101:
166:
262:
267:
16:
This article is about orbital replacement units of the Hubble Space
Telescope. For orbital replacement units of the ISS, see
236:
43:(HST) was designed with 70 such parts, including scientific instruments and limited-life items such as batteries.
272:
229:
76:
17:
36:
136:
71:
40:
32:
109:
62:
also has such subsystems that provide power generation, power distribution and energy storage.
213:
170:
256:
205:
209:
197:
169:. NASA / Glenn Research Center. 14 February 2008. Archived from
35:
of spacecraft that can be replaced upon failure either by robot or by
48:
72:
Hubble Space
Telescope § Servicing missions and new instruments
47:
mission 3A (SM3A) replaced (or added) 15 ORUs, e.g. it replaced the
137:"Hubble Space Telescope Servicing Mission 3A Media Reference Guide"
143:
167:"Glenn Leads Sustaining Engineering of Power System Hardware"
108:. NASA / Langley Research Center. Archived from
217:
60:
102:"Returned Hardware: Orbital Replacement Units"
237:
8:
244:
230:
131:
129:
127:
95:
93:
89:
106:Hubble Space Telescope Archive System
7:
194:
192:
146:. Lockheed Martin Missiles and Space
216:. You can help Knowledge (XXG) by
14:
196:
1:
289:
191:
15:
77:Orbital replacement unit
29:orbital replaceable unit
25:orbital replacement unit
18:orbital replacement unit
37:extravehicular activity
263:Hubble Space Telescope
41:Hubble Space Telescope
268:Spacecraft components
212:related article is a
79:, about the ISS ORUs
173:on 22 February 2012
112:on 19 February 2013
100:Kinard, William H.
51:computer with the
225:
224:
53:Advanced Computer
33:modular component
280:
273:Spacecraft stubs
246:
239:
232:
200:
193:
183:
182:
180:
178:
163:
157:
155:
153:
151:
141:
133:
122:
121:
119:
117:
97:
288:
287:
283:
282:
281:
279:
278:
277:
253:
252:
251:
250:
189:
187:
186:
176:
174:
165:
164:
160:
149:
147:
139:
135:
134:
125:
115:
113:
99:
98:
91:
86:
68:
21:
12:
11:
5:
286:
284:
276:
275:
270:
265:
255:
254:
249:
248:
241:
234:
226:
223:
222:
201:
185:
184:
158:
123:
88:
87:
85:
82:
81:
80:
74:
67:
64:
13:
10:
9:
6:
4:
3:
2:
285:
274:
271:
269:
266:
264:
261:
260:
258:
247:
242:
240:
235:
233:
228:
227:
221:
219:
215:
211:
207:
202:
199:
195:
190:
172:
168:
162:
159:
145:
138:
132:
130:
128:
124:
111:
107:
103:
96:
94:
90:
83:
78:
75:
73:
70:
69:
65:
63:
61:
56:
54:
50:
44:
42:
38:
34:
30:
26:
19:
218:expanding it
203:
188:
175:. Retrieved
171:the original
161:
156:Section 2.2.
150:21 September
148:. Retrieved
114:. Retrieved
110:the original
105:
57:
52:
45:
28:
24:
22:
257:Categories
206:spacecraft
84:References
210:satellite
177:27 March
116:27 March
66:See also
49:DF-224
39:. The
204:This
140:(PDF)
31:is a
214:stub
179:2013
152:2010
144:NASA
118:2013
58:The
208:or
27:or
23:An
259::
142:.
126:^
104:.
92:^
55:.
245:e
238:t
231:v
220:.
181:.
154:.
120:.
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
