TABLES   Table 1. Counts of NSSDC Data Sets and Data Set Sources as of 12/31/97  

Discipline Digital Non-Digital Totals Exps. w. Data S/C w. Data
Astronomy 200 112 312 125 37
Space/Solar Phys. 1,377 1,057 2434 725 157
Planetary 485 727 1212 288 86
Earth 113 94 207 180 99
Other 43 144 187 12 0
Totals 2,218 2,134 4,352 1,330 379

    Table 2. State of the NSSDC Archive 12/31/97  

Discipline

No. of Terabytes

No. of Terabytes Network-Accessible

No. of Media (Digital)*

Astro. 2.4 1.6 3,637
Space Physics 4.3 0.7 15,213
Planetary 3.2 0.0 22,538
Earth 3.3 0.0 26,352**
Total 13.2 2.3 67,740

 

* See Table 4 for detail; not counted is large quantity of data on microfilm, microfiche, etc.

** Awaiting transfer to EOSDIS

   

Table 3. Data Electronically Accessible from NSSDC as of December 31, 1997  

Total Volume (GB) as of 12/31/97

Total Volume (GB) as of 12/31/97

Astrophysics

Online

Nearline

Space Physics

Online

Nearline

ADC 7 ARCAD 1
Astro COHO 3
HUT 0.2 DE 2 208
UIT 35 FAST 4 4
WUPPE 20 Hawkeye 14
CGRO 1 IMP 8 1 21
COBE 32 ISEE 9
GINGA` 1 ISIS 4 94
HEAO-1 13 ISTP (KP) 27 27
HEAO-2 4 OMNI 0.1
Astrophysics

Online

Nearline

Space Physics

Online

Nearline

HEAO-3 1 Pioneer 1
HST 3 SAMPEX 2 26
IRAS 84 San Marco 0.1
IUE 1,362 Skylab 7
NRAO 1 SOHO 0.3
OGLE 43 Ulysses
ORFEUS 0.3 Voyager 22
OSO 8 23 Wind 3 3
Vela 5B 21 Yohkoh 224
Subtotal 39 1,613 Subtotal 47 665
Grand Totals 86 2,278

    Table 4. Counts of Volumes at NSSDC Archive on 12/31/97  

Storage  
Medium

Astrophysics

Space Physics

Planetary Science

Earth Science

Total

4-mm Tape 447 22 2 0 471
8-mm Tape 213 380 79 0 672
9-Track Tape 2,686 10,364 20,747 26,352 60,149
CD-ROM (Titles) 36 73 739 0 848
CD-WO 5 4,119 971 0 5,095
12" WORM (Offline) 0 56 0 0 56
12" WORM (NDADS) 250 96 0 0 346
M-O Disk 0 103 0 0 103
Totals 3,637 15,213 22,538 26,352 67,740

Backup volumes not included.

  Table 5. Photographic Data Products at NSSDC by Discipline  

Discipline

Microfilm

Microfiche

Film (ft.)

Film (frames)

Reels

Slides

Astrophysics 6,020 18,524 100 63,459 121
Earth Sci. 1,430 4,200 236,066
Planetary Sci. 3,294 6,345 143,214 390,735 259 5
Space Phys. 20,188 13,269 4,640 4,379 41,502
Communications 183
Other 162
Totals 31,277 38,138 152,154 694,639 259 41,528

    Table 6. Data Arriving at NSSDC During 1997  

Astrophysics

(GB)

Planetary

(GB)

Space Physics

(GB)

ADC 0.1  Clementine 9 ARCAD 1
ASCA 44 Galileo 0.4 FAST 576
COBE 17 Magellan 17 IMP-8 66
IUE 543 Mariner 9 & 10 7 ISEE 15
OGLE 42 Pioneer Venus 7 ISIS 87
ORFEUS 0.1 Viking 1 and 2 27 ISTP
ROSAT 17

KP's

24
Wind  10

Geotail L0

157
WUPPE 13

Polar L0

268

Wind L0 +

61
OGO 5
SAMPEX 28
Ulysses 12
Voyager 9
Yohkoh 48
Subtotal 686 Subtotal 67 Subtotal 1357
Grand Total 2,110

 

• 100 Data sets from 84 experiments arrived in 1997

• First data from 13 experiments arrived in 1997

  Table 7. Media Arriving at NSSDC During 1997  

Media

Astrophysics

Space Physics

Planetary Science

Total

4-mm Tape 0 3 0 3
8-mm Tape 74 0 0 74
9-Track Tape 18 17 0 35
CD-ROM (Titles) 3 39 60 102
CD-WO 0 2,116 68 2,184
Magneto-Optic Disk 0 30 0 30
Floppy Disk 0 1 0 1
Total 95 2,206 128 2,429

    Table 8. Annual Access Statistics for Special Space Physics Systems  

Systems

First Went Public

1995

1996

1997

CDAWeb

6/96

11,752/2,518 36,606/8,481
OMNIWeb

12/94

4,372/1,064 5,181/2,470 7,325/3,621
COHOWeb

4/95

834/215 1,218/567 1,219/621

First member of each pair is the number of plots created. Second is the sum of numeric screen listings plus ASCII or CDF files created and downloaded.

 

  Table 9. Numbers of Files FTP-Downloaded from NSSDC (in Thousands), EXCLUDING NDADS  

FTP Directory

1995

1996

1997

Photo_Gallery 26 59
Geophys_Models 15 18 27
COHO 11 15 11
CDF 7 11
FITS 3 6
COBE 4 3 2
All Others 49 44 68
Totals 79 116 184

    Table 10. NDADS 1997 Access Stats - Missions with >10 Unique Sites Accessing Data Monthly  

Missions by Discipline

No. Requests

Mean Monthly E-addresses Accessing

No. Files

Astrophysics

IUE

5,773 97 327,000

IRAS

457 17 2,486

Subtotal

6,230 329,486

Space Physics

IMP 8

1,230 22 26,350

ISTP

546 15 17,096

Subtotal

1,776 43,446

All Others

2,675 84,668

Grand Totals

10,681

457,600*****

    Table 11. NSSDC User Community (Offline Requests) [CY 1997]  

Affiliation Category

Total Requests

Percent of Total

No Affiliation [General Public] 1467 39.34
Non-US 1212 32.50
US Universities/Colleges 580 15.55
US Private Industry 200 5.36
NASA/GSFC 76 2.04
NASA Centers, Excluding GSFC 57 1.53
Other Government Agencies 117 3.14
Miscellaneous 20 0.54
Total 3,729 100.00

 

  Table 12. Number of Requests for Offline Satellite Data from NSSDC by Discipline  

Discipline Data Set Requests, 1968 - 1997 Offline Data Set Requests, 1997
Astrophysics 9,220 1,211
Earth Science 7,068 13
Planetary Science 38,792 1,946
Space Physics 7,869 66
Ephemeris 86 6
Other 20 1
Total 63,055 3,243

    Table 13. NSSDC Offline Data Dissemination Statistics as of December 31, 1997  

Offline

1993

1994

1995

1996

1997

Number of Requests for Tapes 209 127 67 30 25
Number of Tapes Mailed 755 2,544 676 401 428
Number of Requests for CDs 1,320 874 814 1,233 1,297
Number of CDs Mailed 11,405 10,669 10,469 4,804 6,220
Number of Film Requests 175 181 128 177 192
Number of Film Volumes Mailed 1,544 3,724 894 1,733 2,383

    Table 14. AIM Partition Statistics for CY 1997  

Subpartition

Number of Records as of 12/31/97

Number Added in 1997

Spacecraft 5,328 173
Experiment 5,533 80
Data Set 5,384 73
Totals 16,245 326

Number of spacecraft with experiments - 1,040

Number of experiments with data sets - 1,365

  Table 15. NSD Partition Statistics for CY 1997

Discipline

Number of Data Sets

Astrophysics

1,036

Space Physics

436

Earth Science

65

Planetary

39

Other

28

Total

1,604

 

 
      Table 16. TRF Partition Statistics as of 12/31/97  

Total Number of Records: 38,360  Number of Records Inserted: 730 

   

  Table 17. IRAND Partition Statistics as of 12/31/97  

Record Type

Total Records

Records Inserted

Records Updated

Personnel 53,770 2,868 4,501
Request 77,383 3,727