/ /'A/ -2 $7- 

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FINAL REPORT f!! 3 3 

/ FOR 

UPRS 

SPACECRAFT RECORDER 

g< NAS -5- 29 186 

(NASA-CR-180? 68) U ARS SP ACECRAFT R EC 0RD EB N88- 2 23 31 

Final Report 

32 P 

(RCA Aerospace and Defense) 

CSCL 14c 

Uaclas 

G3/3S 0092622 

PR EPAR ED FOR : 

GODDPRD SPACE FLIGHT ENTER 

REENBELT, MD 20771 

23 JULY 1987 
b 

% 1 1 

A. PROGRPM OBJECTIVE 

The objective of this proqran was the design, developnent and fabrication 

of UARS Spacecraft Recorders per the requirements of Attachment 1, GSFC, 

Statement of Work for the UARS Tape Recorders, dated October 24, 1984. 

This contract (NAS-6-29186) was awarded in July, 1985, and was scheduled 

for hardware delivery by June 15, 1987. 

B. RECORDER SLMMARY 

The UARS REcorder is a tailored confiquration of the RCA Standard Tape 

recorder STR-108 (AT) (see attached data sheet). The tailored UARS 

configuration consists of two EU's and two Tu's in a cross-strapped 

confi quration providinq maximum redundancy. In this confi guration either 

EU is able to operate either TU non-concurrently. Viewqraph #3 in the 

attached Pre-Ship Review packaqe is a photoqraph of the actual UARS system 

in its cross-strapped configuration. VG #4 depicts the uncovered TU 

mechanism. 

Recorder Hiahliahts 

UARS recorder hiqhlights and design improvments such as sinqle 

recordlplay head, multilayer boards, extensive thermal stress testing and 

Grade 1 parts are shown in VG #6. Specific command structures and record 

play speeds are tabulated in Viewqraph #8. 
Exampl es are: 

Record speed 4 MUX = 0.84 IPS 

8 MUX = 0.42 IPS 

Play speeds 4 MUX - 6.7 IPS & 13.4 IPS 

8 MUX - 6.7 IPS & 13.4 IPS 

Fwd & Rev Rewind is 34.7 IPS 

Parts - Althouqh the UARS RECORDER IS A Grade 2 proqrm, 95% + of the 

parts are Grade 1 as a result of the concurrent parts procurement of UARS 

and NOM. See VG #lo. 

NASPPR/SCD status 

All NSPARS were approved - Viewgraph #11 provides the details of each 

NASPAR. 

De v i at i on s/W a i v er s 

All deviations and waivers were approved - details are shown in Viewqraph 

#12. 

MRB Is 

Two MRB’s were performed and approved - details are shown on Viewqraph #13. 

Part Failures 

Only four part failures (all informal) occurred durinq the proqram. 

Details are qiven on VG #14. 
Environmental Test Summary 

Critical parts and subasse&lies are thermally cycled over extreme 

temperatures many times, e.q. 25 times for transformers -55OC to 

+85OC, circuit boards eleven times -20°C to +80°C. 

Verification tests on the recorder system were performed prior to 

acceptance at -15'~ to +45OC. 

cycles ranqinq between -1OOC to +4OoC, and Random Vibration 3 axis one 

minute each 10 q's RMS plus a leak test at 1 x MM Hq vacuum. 

Acceptance Tests in'cluded six thermal 

Details of these environmental tests are covered in Viewgraphs #16 throuqh 

#19. 

SD a cecr aft Con f i au r at i on V er i f i ca ti on 

The UARS system confiquration was verified aoainst the spacecraft mountinq 

specifications. VG #21 depicts the configuration and siqnificant 

dimensions. 

C. PROGRAM RESULTS 

All hardware design, fabrication, test and documentation (other than this 

final report) was completed per GSFC SOW and delivered to NASA on June 12, 

1987. 

All deliverables, services and reviews per the SOW and Section 6 items A-1 

throuqh A-6, and items B-1 through B-3 have been completed i n f u l l 

compliance with the contract and are listed below. 

/- 

,/' 
Item B-4 sustaining engineerinq, 400 hours, is in reserve (throuqh October 

of 1989, the original UPRS launch date)) for any required assistance 

durinq spacecraft inteqration and test. 

1. Hardware 

- Item 

A- 1 

A-2 

A- 3 

A-4 

A- 5 

A- 6 

Descr i Pt i on Ouan ti ty Status 

Fli ght Spacecraft Recorders 2 Complete 

Cross-Strap Harness 1 Complete 

Matinq Half 7 Each Spacecraft 1 1/2 full set Complete 

I nter fa ce Connector 

Reusable Shippinq Container 2 C ompl e te 

Connect or Savers 1 set for Complete 

each Recorder 

Fit Check Template 1 Complete 

2. Reviews/Services 

- Item 

9- 1 Preliminary Status Review 

Des cr i pt i on 

B-2 Pretest Review 

8-3 Do cumen ta ti on & Rev i ews 

B- 4 Sus t a i n inq En qi neer ing 

Ouanti ty Status 

1 Complete 

1 Complete 

As specified Complete 

in Schedule 

an d/ or State - 

ment of Work 

400 hours As needed 
D. PRE-SHI P REVIEW DOCMENTATION 

Attached is a copy of the complete Pre-Ship Review presentation held on 

June 11, 1987 which provides a summary of desiqn, test, and environmental 

results, Deviations/Waivers, Malfunction Reports/Closures and Contract 

I tern sat i s fac ti on. 
I 

'. ' , STR-108 (AT) I 

L 

5 x 108 Bit Spaceborne 

Standard Tape Recorder System 

TRANSPORT UNIT 

Dimensions exclude connectors and mounting flange 

< 

STR-108 (AT) 

4" 

ELECTRONICS 

UNIT 

J 

/ 

TWO TRANSPORT CONFIGURATION 

DESCRIPTION 

The STR-108 (AT)is the Advanced Technology version of 

the STR-108, a complete magnetic recorder/data storage 

system designated by NASA as the Standard Tape Recorder 

in its capacity range. Development and production of this 

system has been sponsored by the Goddard Space Flight 

Center. 

STR-108 (AT) with unmatched space recorder reliability. 

Designed to operate unattended in the space environment, 

the STR-108 system consists of two units. the Transport Unit 

(TU) and the Electronics Unit (EU). The system features serial 

input and output ports and provides automatic internal 

multiplexing to accommodate a wide range of data rates. The 

hermetically sealed TU consists of a coaxial reel-to-reel tape 

transport with associated negator-spring tape tensioning 

system, bearing assemblies, motor/capstan. record/playback 

head, and erase head. TU circuitry includes motor drive 

electronics, redundant end-of-tape sensors, record amplifiers. 

preamplifiers, and transport-related telemetry systems. The 

vented EU contains the balance of the data conditioning 

circuitry as well as the command and telemetry subsystems, 

power conditioning circuitry, and timing references. 

operation. Electronic Units (EU's) and Transport Units (TU's) 

are constructed so that they can be mounted separately or in 

stacked assemblies. One EU can operate with one or two 

TU's; Two EU's can operate with either of two TU's. 

Advanced Technology enhancements provide the 

Extended Thermal and Electrical Prestressing 

Increased Reliability 

Extended Life 

0 Tested Beyond 50,000 Tape Passes 

Single RecordlPlay Head 

0 Decreased Tracking Error 

0 Increased Error Budget 

0 Increased Tape Life 

Advanced Packaging Techniques 

0 Repeatable Quality 

0 Improved Serviceability 

The STR-108 is designed for flexible mounting and 

FEATURES 

0 Brushless DC Direct Drive Motor 

0 Two Magnetic Tracks for Each Data Channel 

0 Tape Speed Ratio of 160:l in Either Direction 

0 Record or Play in Either Direction 

0 Separate Electronics 8 Transport Packages 

0 5.3 x 108 Bits Storage Cape-ity Per Transport Unit 

I/O Continuously Variable from 2.0 Kb/s to 2.56 Mb/s 

0 Designed for Use on Diverse Spacecraft 

0 Wide Variety of Mounting Optiors 

0 EU/TU Cross-Strapping Modes Available 

ENVIRONMENTAL QUALIFICATIONS 

Random Vibration: 24.4 G RMS 

0 Sine Vibration: 20 G 

0 Operating Temp: -1OOC to +4OoC 

Storage Temp: -2OOC to +5OoC 

0 Radiation: lo5 RADS 

0 EMC: MILSTD461 

Communication and 

Information Systems Divsion 
'. $pecifications 

GENERAL 

Transport Configuration ........ Tape Tensioning ............. 

Tape ...................... Tape Drive ................. 

Tapespeed ................. Motor ..................... 

Tape Packing Density ......... 

Number of Channels .......... 

Coaxial Reel-to-Reel 

Negator Spring, No Gears 

W' x 1 mil (nom) x 625 ft. 

Direct Capstan, No Belts 

Brushless DC Direct Drive 

0.33 (0.2)* ips to 35 ips 

9560 Bits/lnchf Channel 

8 (16 Heads, Redundant) 

INPUT POWER REQUIREMENTS 

Voltage .................... f28 V DC 535% 

Record .................... 7 to 10 Watts (depending 

Playback ................... 16 to 19 Watts (depending 

Standby ................... 1.4 Watts 

on tape speed) 

on tape speed) 

SIGNAL CHANNEL SPECIFICATIONS 

No. of Channels 8, Each with separate Record/Play 

Amplifiers 

Total Data Storage 

Record Data Rates 

Playback Data Rates 

Error Rates (Max) 

Date Format on Tape Bi-Phase 

Input 

5.3 x lo8 bits (Single Transport Unit) 

3.0(2.0)* Kb/s to 2.56 Mb/s 

32 Kbfs to 2.56 Mb/s 

5 x 10-7 (Beginning of Life) 

1 x 10-6 (End of Life) 

NRZ or Bi-Phase Level plus Clock 

output NRZ or Bi-Phase Level plus Clocks 

and Preamble 

Record/Playback Mode 

Output Timing Errors 

Single Channel, Multiplexed Two, 

Four or Eight Channels 

None, Removed by Buffer 

COMMANDITELEYETRY 

The Command/Telemetry System of the STR-lOB(AT) is 

supplied with an interface adaptable to match any mission 

need. Two plug-in boards in the EU are available to 

accommodate specific spacecraft command/ telemetry 

requirements. 

Specifications furnished by RCA are believed to be accurate 

and reliable. However, all Specification data is subject to 

change without notice. 

Communication and 

Information Systems Divsion 

PHYSICAL 

Transport Unit Electronics Unit 

Size (excluding connectors 6.0 x 7.75 x 3.0 in 6.0 x 7.75 x 5.0 in 

8 mounting flanges) 15.2 x 19.7 x 7.6 cm 15.2 x 19.7 x 12.7 cm 

Weight (Less Cables) 6.7 Ibs. 7.2 I bs. 

3.0 Kg 3.3 Kg 

PLAY/RECORD TIME 

Eight Channels Multiplexed ..... 3.4 Minutes to 9.2 Hours 

All Channels in Sequence ...... 27 Minutes to 73 Hours 

STANDARD BIT RATES AND SPEEDS 

DATA RATES TAPE MOTION 

I 8- 

Single 2 Channel 4 Channel 8 Channel Duration of 

Channel MUX MUX MUX Speed OnePass 

(Kbls) (Kbls) (Kbls) (Kb/s) (IPS) (Minutes) 

------ 7- 

320 

256 

200 

160 

128 

100 

80 

64 

50 

40 

32 

25 

20 

16 

125 

10 

8 

6 25 

50 

40 

31 

2 5' 

2 0' 

NOTES: 

640 1280 

512 1024 

400 800 

320 640 

256 512 

200 400 

160 320 

128 256 

100 200 

80 160 

64 128 

50 100 

40 80 

32 64 

25 50 

20 40 

16 32 

12.5 25 

10 20 

8 16 

6.25 12.5 

5.0' 10. 

4.0* 8' 

2560 

2048 

1600 

1280 

1024 

800 

640 

512 

400 

320 

256 

200 

160 

128 

100 

80 

64 

50 

40 

32 

25 

20' 

16' 

33 5 

26 8 

20 9 

16 7 

134 

10 5 

688 

858 2 

837 137 m 

669 1672 % 

523 220 2 

418 275 

335 343 

268 429 

209 550 

167 688 

134 858 

105 109 

837 137 

669 172 

523 220 

418 275 

0335 343 

0268' 429 

0209 * 550 

a: 

1. Recording can be made at any speed regardless of the 

2. Data rates other than those shown are available by varying the 

assignment of a playback range. 

input clock rate (external reference) or selecting specific 

crystal oscillators. (Internal Reference) 

3. The playback rates can be varied by command up to 1O:l 

range. 

* Residual Angular Momentum increases from 0.007 to 0.16 inIb-sec ((933.5 ips) when configured to record at 0.268 and 

0.209 ips. 

For Further information Please Contact: 

Manager, Marketing , Recording Systems 

Building 2-4 

Camden, New Jersey 081 02 

(609) 338-3047 

GSD/SCN-307-76 (Rev 2/86) 
UARS 

PRE-SHIP REVIEW 

WELCOME 

JUtiE 11, 1987 

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