1993-076A - USA 98

Název objektu	USA 98
	NATO 4B [=North Atlantic Treaty Organization]
SSC	22921
Start	1993-12-08 00:48 UT, Eastern Test Range, Delta 7925
Stav objektu	na geocentrické dráze
Očekávaná životnost na dráze	neomezená
Provozovatel	NATO
Výrobce	Velká Británie, British Aerospace Space Systems
Kategorie	vojenská telekomunikační družice
Hmotnost	1430.6 kg

Parametry dráhy

Epocha	Typ	i	P	hP	hA	Pozn.
93-12-07.89	G	23.29°	647.11 min	763 km	36046 km
93-12-08.34	G	23.19°	643.70 min	726 km	35908 km
93-12-12.53	G	4.18°	1448.49 min	35107 km	36950 km
96-08-23.00	G	2.75°	1436.10 min	35778 km	35795 km
97-01-19.83	G	2.54°	1436.05 min	35779 km	35793 km
97-07-02.08	G	2.33°	1436.04 min	35777 km	35794 km
98-01-02.22	G	2.10°	1436.10 min	35779 km	35794 km
98-02-06.07	G	2.06°	1438.53 min	35768 km	35900 km
98-04-03.23	G	1.98°	1436.11 min	35775 km	35799 km
98-10-01.16	G	1.78°	1436.09 min	35773 km	35800 km
99-05-17.07	G	1.57°	1436.10 min	35774 km	35800 km
01-09-08.02	G	1.78°	1436.10 min	35770 km	35803 km
02-02-06.81	G	2.00°	1436.09 min	35770 km	35804 km
02-06-23.11	G	2.20°	1436.12 min	35776 km	35798 km
02-08-29.16	G	2.32°	1436.13 min	35549 km	36025 km
02-09-07.09	G	2.33°	1436.08 min	35764 km	35809 km
02-12-29.05	G	2.53°	1436.11 min	35774 km	35800 km
03-04-08.01	G	2.73°	1436.11 min	35772 km	35802 km
03-07-24.83	G	2.93°	1436.12 min	35775 km	35799 km
03-11-02.04	G	3.14°	1436.12 min	35776 km	35798 km
04-03-03.02	G	3.40°	1436.08 min	35772 km	35801 km
04-06-20.07	G	3.63°	1436.11 min	35775 km	35799 km
05-01-09.12	G	4.07°	1436.08 min	35775 km	35797 km
05-04-11.10	G	4.28°	1436.12 min	35774 km	35801 km
05-07-24.84	G	4.52°	1436.13 min	35772 km	35803 km
05-09-12.93	G	4.63°	1436.07 min	35543 km	36030 km
05-09-17.37	G	4.64°	1436.09 min	35776 km	35797 km
05-12-08.98	G	4.84°	1436.10 min	35770 km	35804 km
06-03-17.67	G	5.05°	1436.13 min	35769 km	35806 km
06-06-11.13	G	5.26°	1436.09 min	35774 km	35798 km
06-12-09.72	G	5.79°	1617.68 min	36359 km	42180 km
06-12-10.02	G	5.68°	1436.74 min	35784 km	35814 km
07-02-04.71	G	5.81°	1435.90 min	35778 km	35788 km
07-05-02.45	G	6.01°	1436.03 min	35775 km	35796 km
07-08-02.20	G	6.22°	1436.10 min	35775 km	35798 km
07-11-10.92	G	6.45°	1436.07 min	35774 km	35798 km
08-02-02.69	G	6.65°	1436.05 min	35771 km	35801 km
08-05-03.44	G	6.86°	1436.13 min	35774 km	35801 km
08-08-05.18	G	7.07°	1436.10 min	35775 km	35799 km
08-11-05.93	G	7.28°	1436.09 min	35775 km	35799 km
09-02-07.67	G	7.49°	1436.06 min	35772 km	35800 km
09-05-06.43	G	7.69°	1436.02 min	35775 km	35796 km
09-08-12.16	G	7.90°	1436.12 min	35778 km	35796 km
09-11-12.05	G	8.10°	1436.02 min	35768 km	35802 km
10-02-15.94	G	8.31°	1436.03 min	35775 km	35796 km
10-05-23.77	G	8.52°	1436.14 min	35773 km	35802 km
10-09-04.07	G	8.73°	1436.06 min	35771 km	35800 km
10-12-06.87	G	8.93°	1436.07 min	35775 km	35797 km
11-03-20.95	G	9.14°	1436.07 min	35772 km	35800 km
11-07-06.82	G	9.35°	1436.12 min	35776 km	35798 km

Význam parametrů: Epocha - Datum (rok, měsíc, den a zlomek dne), pro něž platí uvedené parametry. Typ - Kód typu oběžné dráhy : G - geocentrická (Země), i - Sklon dráhy (úhel mezi rovinou dráhy a referenční rovinou, tj. rovníkem nebo ekliptikou). P - Perioda (doba oběhu). h_P - Výška dráhy v pericentru. h_A - Výška dráhy v apocentru.

Pozice na stacionární dráze

Epocha	λ	Δλ	i	Poznámka
95-12-11.00	6.07°	0.02°/d	3.10°
00-05-10.00	-20.22°	0.00°/d	1.44°
08-05-05.43	35.02°	-0.01°/d	6.86°
08-06-29.28	34.95°	0.01°/d	6.98°
08-07-16.23	34.94°	153.95°/d	29.41°
08-07-20.22	34.96°	153.92°/d	29.42°
08-07-25.21	35.03°	153.84°/d	29.39°
08-08-01.19	34.94°	153.95°/d	29.43°
08-08-05.18	34.91°	153.97°/d	29.44°
08-08-07.17	34.92°	153.97°/d	29.44°
08-08-11.16	34.95°	153.93°/d	29.43°
08-08-14.15	35.00°	153.87°/d	29.42°
08-08-20.14	34.95°	-0.01°/d	7.10°
08-09-09.08	35.01°	-0.01°/d	7.15°
08-10-04.01	35.02°	0.00°/d	7.20°
08-11-17.89	35.00°	-0.01°/d	7.30°
08-12-17.81	34.98°	-0.01°/d	7.37°
09-01-11.74	34.99°	0.00°/d	7.43°
09-03-03.60	34.70°	0.00°/d	7.54°
09-04-22.46	34.69°	-0.01°/d	7.65°
09-04-23.46	34.69°	-0.00°/d	7.66°
09-06-07.33	34.75°	0.02°/d	7.76°
09-07-03.26	34.68°	0.02°/d	7.81°
09-08-03.18	34.73°	0.02°/d	7.88°
09-09-08.08	34.70°	-0.01°/d	7.96°
09-10-01.87	35.00°	0.00°/d	8.01°
09-10-03.66	34.48°	0.01°/d	8.01°
09-10-09.95	34.82°	0.00°/d	8.03°
09-11-06.09	34.43°	0.02°/d	8.08°
09-11-07.86	34.90°	0.01°/d	8.09°
09-11-12.04	34.45°	0.03°/d	8.10°
09-11-14.82	35.02°	0.02°/d	8.11°
09-11-19.97	34.42°	-0.01°/d	8.12°
09-11-23.79	34.94°	-0.00°/d	8.13°
09-11-24.94	34.43°	-0.00°/d	8.13°
09-11-26.75	34.99°	0.01°/d	8.13°
09-11-27.80	34.89°	0.00°/d	8.14°
10-01-11.83	34.35°	-0.00°/d	8.23°
10-02-11.01	34.91°	0.01°/d	8.30°
10-02-24.18	34.45°	0.01°/d	8.32°
10-09-16.09	34.54°	0.01°/d	8.76°
10-10-01.85	35.04°	0.02°/d	8.79°
10-10-05.09	34.40°	0.02°/d	8.79°
10-10-06.09	34.42°	0.02°/d	8.80°
10-10-10.81	35.03°	0.00°/d	8.81°
10-10-17.13	34.38°	0.02°/d	8.82°
10-10-18.12	34.36°	0.02°/d	8.82°
10-10-23.78	35.09°	0.03°/d	8.83°
10-10-27.01	34.45°	-0.01°/d	8.84°
10-10-29.84	35.03°	-0.00°/d	8.85°
10-10-31.07	34.36°	0.01°/d	8.85°
10-11-02.83	35.02°	0.00°/d	8.86°
10-11-16.00	34.33°	0.00°/d	8.88°
10-11-17.72	35.05°	0.01°/d	8.89°
10-11-21.94	34.41°	0.01°/d	8.89°
10-11-24.77	35.05°	0.01°/d	8.90°
10-11-27.98	34.35°	0.02°/d	8.91°
10-11-30.69	35.05°	0.00°/d	8.91°
10-12-09.98	34.39°	0.02°/d	8.93°
10-12-28.87	34.36°	0.01°/d	8.97°
10-12-28.87	34.36°	0.01°/d	8.97°
11-01-08.73	34.74°	0.01°/d	8.99°
11-01-08.73	34.74°	0.01°/d	8.99°
11-01-08.73	34.74°	0.01°/d	8.99°
11-01-08.73	34.74°	0.01°/d	8.99°
11-01-08.73	34.74°	0.01°/d	8.99°
11-01-13.78	34.43°	-0.00°/d	9.00°
11-01-13.78	34.43°	-0.00°/d	9.00°
11-01-13.78	34.43°	-0.00°/d	9.00°
11-01-19.00	34.87°	0.03°/d	9.01°
11-01-19.00	34.87°	0.03°/d	9.01°
11-01-19.00	34.87°	0.03°/d	9.01°
11-01-19.00	34.87°	0.03°/d	9.01°
11-01-23.91	34.53°	0.02°/d	9.02°
11-01-23.91	34.53°	0.02°/d	9.02°
11-01-23.91	34.53°	0.02°/d	9.02°
11-01-30.83	34.32°	0.01°/d	9.04°
11-01-30.93	34.67°	0.02°/d	9.04°
11-01-31.86	34.41°	0.02°/d	9.04°
11-01-31.86	34.41°	0.02°/d	9.04°
11-01-31.86	34.41°	0.02°/d	9.04°
11-01-31.86	34.41°	0.02°/d	9.04°
11-01-31.86	34.41°	0.02°/d	9.04°
11-02-16.01	35.01°	0.01°/d	9.07°
11-02-18.74	34.36°	0.01°/d	9.08°
11-02-19.95	35.01°	0.02°/d	9.08°
11-02-19.95	35.01°	0.02°/d	9.08°
11-02-21.83	34.62°	0.03°/d	9.08°
11-02-21.83	34.62°	0.03°/d	9.08°
11-02-21.83	34.62°	0.03°/d	9.08°
11-03-06.65	34.42°	0.01°/d	9.11°
11-03-21.96	34.86°	0.01°/d	9.14°
11-03-23.07	34.39°	0.01°/d	9.14°
11-03-24.07	34.36°	0.01°/d	9.14°
11-03-24.07	34.36°	0.01°/d	9.14°
11-03-25.67	34.32°	0.03°/d	9.15°
11-03-25.67	34.32°	0.03°/d	9.15°
11-04-06.20	34.41°	0.01°/d	9.17°
11-04-06.20	34.41°	0.01°/d	9.17°
11-04-07.78	34.83°	0.01°/d	9.17°
11-04-12.15	34.29°	0.02°/d	9.18°
11-04-13.17	34.37°	0.02°/d	9.18°
11-04-13.17	34.37°	0.02°/d	9.18°
11-04-13.66	34.41°	0.02°/d	9.18°
11-04-15.85	34.99°	0.01°/d	9.19°
11-04-16.87	34.95°	0.01°/d	9.19°
11-04-17.95	34.62°	0.01°/d	9.19°
11-04-18.78	34.97°	0.03°/d	9.20°
11-04-19.98	34.52°	0.01°/d	9.20°
11-04-19.98	34.52°	0.01°/d	9.20°
11-04-27.00	34.30°	-0.01°/d	9.21°
11-04-27.00	34.30°	-0.01°/d	9.21°
11-04-28.65	34.50°	0.01°/d	9.22°
11-04-28.65	34.50°	0.01°/d	9.22°
11-04-29.70	34.74°	0.01°/d	9.22°
11-04-30.82	34.95°	-0.00°/d	9.22°
11-05-01.93	34.52°	-0.01°/d	9.22°
11-05-01.93	34.52°	-0.01°/d	9.22°
11-05-10.39	34.74°	0.01°/d	9.24°
11-05-11.98	34.28°	0.02°/d	9.24°
11-05-11.98	34.28°	0.02°/d	9.24°
11-05-12.93	34.45°	0.01°/d	9.24°
11-05-12.93	34.45°	0.01°/d	9.24°
11-05-15.71	35.03°	0.03°/d	9.25°
11-05-15.71	35.03°	0.03°/d	9.25°
11-05-17.97	34.30°	-0.01°/d	9.25°
11-05-19.72	35.02°	-0.00°/d	9.26°
11-05-21.14	34.68°	0.01°/d	9.26°
11-05-22.21	34.93°	0.00°/d	9.26°
11-05-22.21	34.93°	0.00°/d	9.26°
11-05-23.77	34.94°	-0.01°/d	9.27°
11-05-24.90	34.36°	-0.01°/d	9.27°
11-05-26.13	34.69°	0.02°/d	9.27°
11-05-27.15	34.77°	0.02°/d	9.27°
11-05-27.15	34.77°	0.02°/d	9.27°
11-05-28.78	34.86°	0.00°/d	9.28°
11-05-29.90	34.31°	0.00°/d	9.28°
11-06-01.10	34.65°	0.03°/d	9.28°
11-06-01.10	34.65°	0.03°/d	9.28°
11-06-04.67	35.03°	0.03°/d	9.29°
11-06-08.00	34.42°	0.04°/d	9.29°
11-06-08.00	34.42°	0.04°/d	9.29°
11-06-08.00	34.42°	0.04°/d	9.29°
11-06-13.90	34.22°	-0.01°/d	9.31°
11-06-13.90	34.22°	-0.01°/d	9.31°
11-06-13.90	34.22°	-0.01°/d	9.31°
11-06-14.80	34.58°	-0.02°/d	9.31°
11-06-15.68	34.98°	-0.00°/d	9.31°
11-06-17.81	34.48°	-0.01°/d	9.31°
11-06-18.86	34.26°	-0.00°/d	9.32°
11-06-18.86	34.26°	-0.00°/d	9.32°
11-06-20.09	34.79°	0.02°/d	9.32°
11-06-22.02	34.50°	0.02°/d	9.32°
11-06-22.02	34.50°	0.02°/d	9.32°
11-06-22.02	34.50°	0.02°/d	9.32°
11-06-23.94	34.24°	0.02°/d	9.32°
11-06-23.94	34.24°	0.02°/d	9.32°
11-06-23.94	34.24°	0.02°/d	9.32°
11-06-23.94	34.24°	0.02°/d	9.32°
11-06-27.53	34.75°	0.04°/d	9.33°
11-06-28.97	34.49°	0.04°/d	9.33°
11-06-29.03	34.73°	0.04°/d	9.33°
11-07-04.82	34.32°	-0.01°/d	9.34°
11-07-04.82	34.32°	-0.01°/d	9.34°
11-07-08.97	34.54°	0.02°/d	9.35°
11-07-08.97	34.54°	0.02°/d	9.35°
11-07-18.60	35.05°	0.02°/d	9.37°
11-07-19.73	34.52°	0.01°/d	9.37°
11-07-20.13	34.90°	0.01°/d	9.37°
11-07-20.13	34.90°	0.01°/d	9.37°
11-07-24.78	34.25°	-0.01°/d	9.38°
11-07-25.99	34.83°	0.01°/d	9.39°
11-07-27.18	34.55°	-0.01°/d	9.39°
11-07-27.18	34.55°	-0.01°/d	9.39°
11-07-27.97	34.78°	0.02°/d	9.39°
11-07-27.97	34.78°	0.02°/d	9.39°
11-07-27.97	34.78°	0.02°/d	9.39°
11-07-31.84	34.27°	0.02°/d	9.40°
11-08-01.88	34.41°	0.02°/d	9.40°
11-08-03.00	34.89°	0.02°/d	9.40°
11-08-04.09	34.85°	0.01°/d	9.40°
11-08-05.11	34.75°	0.01°/d	9.40°
11-08-05.11	34.75°	0.01°/d	9.40°
11-08-06.92	34.70°	0.03°/d	9.41°
11-08-07.97	34.91°	0.03°/d	9.41°
11-08-07.97	34.91°	0.03°/d	9.41°
11-08-11.14	34.63°	0.01°/d	9.42°
11-08-14.02	34.98°	-0.01°/d	9.42°
11-08-15.12	34.62°	-0.02°/d	9.43°
11-08-15.12	34.62°	-0.02°/d	9.43°
11-08-15.12	34.62°	-0.02°/d	9.43°
11-08-19.74	34.21°	0.00°/d	9.43°
11-08-21.07	34.73°	-0.00°/d	9.44°
11-08-21.07	34.73°	-0.00°/d	9.44°
11-08-28.22	34.20°	0.02°/d	9.45°
11-09-07.02	34.84°	-0.02°/d	9.47°
11-09-08.07	34.55°	-0.02°/d	9.47°
11-09-09.08	34.49°	-0.02°/d	9.47°
11-09-10.10	34.36°	-0.01°/d	9.48°
11-09-10.10	34.36°	-0.01°/d	9.48°
11-09-11.83	34.78°	0.02°/d	9.48°
11-09-12.02	34.72°	-0.01°/d	9.48°
11-09-14.09	34.35°	-0.00°/d	9.48°
11-09-14.09	34.35°	-0.00°/d	9.48°
11-09-21.78	34.73°	0.04°/d	9.50°
11-09-21.99	34.81°	0.01°/d	9.50°
11-09-22.07	34.40°	0.01°/d	9.50°
11-09-22.65	34.32°	0.02°/d	9.50°
11-09-30.96	34.81°	-0.01°/d	9.52°
11-09-30.96	34.81°	-0.01°/d	9.52°
11-10-04.07	34.25°	-0.00°/d	9.52°
11-10-19.88	34.96°	-0.00°/d	9.55°
11-10-20.99	34.40°	-0.00°/d	9.55°
11-11-01.18	34.77°	0.03°/d	9.58°
11-11-01.18	34.77°	0.03°/d	9.58°
11-11-01.18	34.77°	0.03°/d	9.58°
11-11-01.18	34.77°	0.03°/d	9.58°
11-11-04.11	34.39°	0.01°/d	9.58°
11-11-04.11	34.39°	0.01°/d	9.58°
11-11-04.98	34.25°	-0.01°/d	9.58°
11-11-10.82	34.90°	-0.00°/d	9.60°
11-11-10.82	34.90°	-0.00°/d	9.60°
11-11-13.97	34.23°	0.01°/d	9.60°
11-11-13.97	34.23°	0.01°/d	9.60°
11-11-16.86	34.70°	0.01°/d	9.61°
11-11-16.87	34.74°	0.00°/d	9.61°
11-11-28.99	34.21°	0.01°/d	9.63°
11-11-28.99	34.21°	0.01°/d	9.63°
11-11-30.79	34.82°	-0.00°/d	9.63°
11-11-30.79	34.82°	-0.00°/d	9.63°
11-11-30.79	34.82°	-0.00°/d	9.63°
11-11-30.79	34.82°	-0.00°/d	9.63°
11-11-30.79	34.82°	-0.00°/d	9.63°
11-12-05.67	35.08°	0.02°/d	9.64°
11-12-05.67	35.08°	0.02°/d	9.64°
11-12-05.67	35.08°	0.02°/d	9.64°
11-12-05.67	35.08°	0.02°/d	9.64°
11-12-08.93	34.18°	-0.00°/d	9.65°
11-12-10.72	34.97°	-0.01°/d	9.65°
11-12-11.10	34.78°	0.01°/d	9.65°
11-12-12.75	34.81°	-0.01°/d	9.66°
11-12-13.79	34.58°	-0.01°/d	9.66°
11-12-14.97	34.22°	0.01°/d	9.66°
11-12-14.97	34.22°	0.01°/d	9.66°
11-12-15.96	34.19°	0.01°/d	9.66°

Význam hodnot: Epocha - Datum (rok, měsíc, den), pro něž platí uvedené údaje. λ - Zeměpisná délka subsatelitního bodu ve stupních (kladná je východní délka, záporná je západní délka). Δλ - Denní změna polohy vzhledem k zemskému povrchu (změna zeměpisné délky subsatelitního bodu) ve stupních za den (kladná východním směrem, záporná západním směrem). i - Sklon dráhy k rovníku ve stupních.

Popis objektu

Vojenská stacionární telekomunikační družice. Postavila ji firma British Aerospace Space Systems Ltd., Stevenage (Velká Británie). Provozovatele je Ministry of Defence, London (Velká Británie).

Konstrukce je podobná družici Skynet 4A (typ ECS). Základní těleso má tvar hranolu o rozměrech 1.4x2.1x1.9 m se slunečními panely o rozpětí 16 m (1.2 kW) a je tříose stabilizováno. Startovní hmotnost 1434 kg. Na palubě jsou 2 převáděče v pásmu UHF (250-315 MHz) a 4 převáděče v pásmu X (SHF, 7/8 GHz) o výkonech po 40 W. Telekomunikační vybavení, zajišťující nerušitelné spojení mezi politickými i vojenskými představiteli 16 zemí organizace NATO (North Atlantic Treaty Organization) dodala firma Matra M arconi Space Systems UK, Portsmouth (Velká Birátnie), která rovněž postupně instaluje 70 terminálů Scot v ceně po 1 mil. GBP pro námořní síly V. Británie, Německa, Španělska, Nizozemí a Portugalska.

Plánovaná aktivní životnost je 7 let.

Předchozí vojenskou družicí řady USA je USA 97 (1993-074A), následující je USA 99 (1994-009A).

Průběh letu

Datum	Událost
1993-12-08	00:48 UT: Vzlet.
1993-12-13	Družice byla nosnou raketou vynesena nejprve na eliptickou parkovací dráhu. Asi dvě hodiny po startu byla perigeovým zážehem motoru vlastního stupně PAM-D navedena na přechodovou eliptickou dráhu k dráze stacionární.
1993-12-15	Družice byla zážehem apogeového motoru navedena na předběžnou stacionární dráhu, po které se pohybovala k plánovanému bodu zavěšení kolem 6° v.d.
1998-01-18	Vymanévrován z pozice nad 5° v.d.
1998-02-26	Zakotven nad 10° z.d.

Literatura

1. Satellite Digest-310 / P. S. Clark. - Spaceflight 40 [7] 276-277 (1998).
2. SPACEWARN Activities. - SPACEWARN Bulletin [482] 1 (1993-12-25).     (http://nssdc.gsfc.nasa.gov/spacewarn/spx482.html).

Datum poslední úpravy: 2011-12-18 11:08:36 UT

© 2011 - Petr Lála, Antonín Vítek