Table 1.
Counts of NSSDC Data Sets and Data Set Sources as of 12/31/99

Discipline Digital Non-Digital Totals Experimiments with Data Spacecraft with Data
Astronomy

227

112

339

128

39

Space/Solar Physics

1,471

1,059

2,530

788

189

Planetary

562

730

1,292

298

93

Earth

113

94

207

180

99

Other

44

144

188

12

0

Totals

2,417

2,139

4,556

1,406

420

 

Table 2.
State of the NSSDC Archive as of 12/31/99

Discipline No. of Terabytes No. of Terabytes Network-Accessible No. of
Media (Digital)*
Astro

4.9

1.68

4,022

Space Physics

6.9

1.35

19,758

Planetary

3.5

0

23,147

Earth

3.3

0

26,352**

Total

18.6

3.03

73,279

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

 

Table 3a.
Astrophysics Data Electronically Accessible from NSSDC
as of December 31, 1999

Project Online Nearline
ADC

17 GB

Astro
HUT

0.6 GB

UIT

35

WUPPE

20

CGRO

1

COBE

21

GINGA

1

HEAO-1

13

HEAO-2

4

HEAO-3

1

HST

3

IRAS

84

IUE

1,395

NRAO

1

OGLE

43

ORFEUS

0.3

OSO 8

23

Vela 5B

21

Totals

38 GB

1,646 GB

 

Table 3b.
Space Physics Data Electronically Accessible from NSSDC
as of December 31, 1999

Online

Nearline

CDAWeb Anon/FTP NDADS
ACE
† 0.3 GB

††††††††

AE C,D,E

0.51 GB

†††

AEROS

0.01

††††††††

ARCAD

0.88

CDAW 9

0.05

DE

18

0.24

209 GB

Equator-S

0.5

0.4

FAST

21

8

Geotail

3.8

*

GOES

0.7

0.5

Ground-bsd

2.2

Hawkeye

20

Helios 1&2

0.03

Hinotori

0.14

Online

Nearline

CDAWeb Anon/FTP NDADS
IMP 8

0.5

0.32

43

Interball

0.3

0.2

ISEE

9

ISIS 1&2

7

384

ISTP

*

168

LANL

2.8

2.4

OMNI

0.25

Pioneer 10&11

0.41

1

PVO

0.03

Polar

82

*

Russian_MSU

0.56

SAMPEX

3.1

46

San Marco

0.15

0.1

Skylab

7

SOHO

0.32

0.3

Ulysses

†1.7

1.58

24

Voyager 1&2

0.52

22

Wind

2.9

*

Yohkoh

253

Totals

150

5.63

1198

* Counting differences in CDAWeb and NDADS lead to grouping Wind, Polar, and Geotail as "ISTP" in the NDADS column.

 

Table 4.
Counts of Volumes at NSSDC Archive as of 12/31/99

Media Astro-
physics
Space Physics Planetary Science Earth Science Total
4-mm Tape

449

23

2

0

474

8-mm Tape

221

403

79

0

703

9-Track Tape

2,687

10,425

20,749

26,352

60,213

CD-ROM (Titles)

39

200

909

0

1,148

CD-WO

184

8,276

1,405

0

9,868

12" WORM (Offline)

0

56

0

0

56

12" WORM (NDADS)

288

208

0

0

496

M-O Disk

0

158

0

0

168

DLT

154

9

0

0

163

Totals

4,022

19,758

23,147

26,352

73,279

Backup volumes not included

 

Table 5.
Photographic Data Products at NSSDC by Discipline

Discipline

Micro-
film
Micro-
fiche
Film (feet) Film (frames) Reels Slides
Astrophysics 6,020 18,524 100 63,459 121
Earth Science 1,430 4,200 236,066
Planetary Science 3,294 6,345 143,214 392,122 259 5
Space Physics 20,188 14,669 4,640 4,379 41,502
Communications 183
Other 162
Totals 31,277 39,538 152,154 696,026 259 41,528

 

Table 6.
Data Arriving at NSSDC During 1999

Astrophysics
Planetary
Space Physics

ADC

2.5 GB

Clementine

0 GB

ACE

23 GB

COBE

5.9

Galileo

8.8

FAST

564

EUVE

5.8

Magellan

8.0

IMP-8

4.5

IUE

3.3

Mariner 4-9

5.1

ISEE

28

Ulysses

0.2

Pioneer Venus

3.6

ISIS

142

Wind

3.1

Viking 1 and 2

12

ISTP

Voyager 1&2

114

†† KPís

110

From HEASARC:

Mars Observer

0

††† Geotail L0

153

Mars Global Survír

18

††† Polar L0

291

RXTE

514

Apollo 8

0

††† Wind L0 +

45

ASCA

352

Giotto

0

ATS-6

5.9

CGRO

145

Lunar Prospector

5.1

SAMPEX

19

Exosat

81

Lunar Surveyor 5-7

0.1

Ulysses

10

ROSAT

68

SL-9/Jupiter

2.9

DE

19

EUVE

39

 

Yohkoh

14

Other

93

 

S3-2, S3-3

3.7

       
 
 

Subtotal

1313

Subtotal

178

Subtotal

1340

 
 
 

Grand Total

2,831

•109 new data sets from 74 experiments arrived in 1999
• First data from 60 experiments arrived in 1999

 

 

Table 7. 
Media Arriving at NSSDC During 1999

Media Astro-
Physics
Space Physics Planetary Science Total
4-mm Tape

1

0

0

1

8-mm Tape

†6

0

0

6

9-Track Tape

0

11

0

11

CD-ROM (Titles)

0

105

87

192

CD-WO

169

2,215

252

2,636

Magneto-Optic Disk

0

24

0

24

DLT

102

0

0

102

Total

278

2,355

339

2,972

 

Table 8a.
Annual Access Statistics for Special Space Physics Systems

1997 1998 1999
CDAWeb

36,606/8,481*

58,786/23,483

68,127/26,558

OMNIWeb

7,325/3,621

8,784/3,042

9,203/3,349

COHOWeb

1,219/621

1,005/650

1,299/468

ATMOWeb

2,774 **

* For first three rows, first member of each pair is the number of plots created.† Second member is the sum of numerical screen listings plus user-created-ASCII files or CDF files downloaded.

** ATMOWeb count is number of executions of the ATMOWeb software yielding plots, listings, or ASCII files.† The count is annualized based on August-December statistics.

 

Table 8b.
1999 Access Statistics to Geophysical Models and Ephemerides Services

Geophysical Models

 

†††††††† International Reference Ionosphere

18,837

††††††† MSIS Atmospheric Model

15,317

††††††† International Geomagnetic Reference Field

17,899

†††††††††††† (includes Corrected Geomagnetic Coordinate Transformations)

†††††††††††††

††††††† Tsyganenko 1989, 1996 Magnetic Field

1,243

††††††† Trapped Particles

2,507

 

††††††† Total, Geophysical Models

55,803

 

Satellite Situation Center/SSCWeb

††††††† (magnetosphere and near-magnetosphere spacecraft orbits)

 

††††††† Plots

10,739

††††††† Tabular and "Query"

6,603

 

††††††† Total, SSCWeb

17,342

Heliocentric Spacecraft, Planets, Comets Orbits 3,427

These counts are software executions, yielding results for user-specified criteria.† They do not include ftp-downloads of corresponding software

 

 

Table 9. 
Number of Files Downloaded from ANON/FTP,
Excluding NDADS

1996 1997 1998 1999

Photo_Gallery

26,000

59,000

504,000

1,381,000

Spacecraft_Data† (= "COHO" through 1998)

15,000

11,000

10,000

113,000

All Others

75,000

114,000

151,000

229,000

Total

116,000

184,000

665,000

1,723,000

 

 

Table 10. 
NDADS 1999 Access Stats - Missions with >10 Unique Sites
Accessing Data Monthly

Number Requests Mean Monthly E-addresses Accessing Number Files

Astrophysics

IUE

2,861

46

130,636

IRAS

383

15

3,675

Space Physics

IMP 8

944

19

28,077

ISTP

743

17

17,022

DE

1,908

11

46,229

All Others

2,366

29,857

Grand Totals

9,225

255,596

 

Table 11. 
NSSDC User Community (Offline Requests) [CY 1999]

Affiliation Category Total Requests Percent of Total

No Affiliation
[GeneralPublic]

680

48.4

Non-US

426

30.3

US Universities/Colleges

90

6.4

US Private Industry

101

7.2

NASA/GSFC

35

2.5

NASA Centers, Excluding GSFC

36

2.6

Other Government Agencies

27

1.9

Miscellaneous

11

0.8

Total

1,406*

100

* Requests for 2,710 Milky Way posters and 1,311 COBE posters are not included in this total.

 

 

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

Discipline Data Set Requests
1968 - 1999
Offline Data Set Requests 1999

Astrophysics

10,630

476

Earth Science

7,128

20

Planetary Science

42,856

2,075

Space Physics

8,296

198

Ephemeris

86

0

Other

20

0

Total

69,016

2,769

*† One request for all or parts of two distinct data sets adds two to these† Table 12 statistics, but only one to the Table 11 statistics.

 

 

Table 13. 
NSSDC Offline Data Dissemination Statistics as of December 31, 1999

Offline 1995 1996 1997 1998 1999
Number of Requests for Tapes 67 30 25 24

12

Number of Tapes Mailed 676 401 428 925

66

Number of Requests for CDs 814 1,233 1,297 1,079

1,013

Number of CDs Mailed 10,469 4,804 6,220 6,825

7,014

Number of Film Requests 128 177 192 300

230

Number of Film Volumes Mailed 894 1,733 2,383 2,353

1,520

 

Table 14. 
AIM Partition Statistics for CY 1999

Number of Records Number Added
Subpartition as of 12/31/99 in 1999
Spacecraft

5,616

292

Experiment

5,669

246

Data Set

5,618

171

Totals
16,903
709
Number of spacecraft with experiments - 1,061
Number of experiments with data sets - 1,441

 

Table 15. 
NSDF Partition Statistics for CY 1999

Discipline

Number of Data Sets
Astrophysics

1,037

Space Physics

441

Earth Science

65

Planetary

43

Other

28

Total

1,614

 

Table 16. 
TRF Partition Statistics as of 12/31/99

Total Number of Records 41,306
Number of Records Inserted 1,463

 

Table 17.
IRAND Partition Statistics as of 12/31/99

Record Type

Total Records Records Inserted Records Updated
Personnel

55,767

991

8,267

Request

80,408

1,386