Table 1.  Counts of NSSDC Data Sets and Data Set Sources
December 31, 2001

 

Exps w.

S/C w.

Discipline

Digital

Non-Digital

Totals

Data

Data

--------------

---------

-----------------

---------

----------

---------

         

Astronomy

236

75

311

92

23

Space/Solar

1,234

660

1,894

754

217

 Physics

Planetary

623

748

1,371

327

83

Earth

130

121

251

118

49

Other

95*

437*

532

10

1

Totals

2,318

2,041

4,359

1,301

373

* "Other" includes 93 digital and 426 non-digital ephemeris data sets.

 

 

Table 2.  State of the NSSDC Archive
December 31, 2001

Number of

No. of TeraBytes

Number of

TeraBytes

Network-Accessible

Media (Digital)*

--------------

----------------------------

---------------------

     

Astro

5.4

0.12

1,491

Space Physics

9.8

1.02

21,849

Planetary

3.9

0

14,934

Earth

3.3

0

27,636**

Other

0.1

0

380

Total

22.5

1.15

66,692

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

** Awaiting transfer to EOSDIS

 

Table 3.  Data Migrated to Nearline Permanent Archive

2000

2001

Files/1000

GB

Files/1000

GB

             

IMP 8

22.2

14.3

0.9

1.6

ISIS

302.8

163.1

594.2

328.4

DE

71.6

193.3

IMAGE

5.5

77.5

IRAS

12.6

14.0

ISEE

4.2

1.6

SAMPEX

6.8

44.2

             

Totals

325.0

177.4

695.8

659.6

 

Table 4.  Astrophysics Data Electronically Accessible from NSSDC
December 31, 2001

                                          

ADC

19.2 GB

COBE

28.0

IRAS

75.7

SWAS

1.3

 

Totals

124 GB

                                   


Table 5.  Space Physics Data Electronically Accessible from NSSDC
December 31, 2001

                       

CDAWeb

anon/ftp

   

ACE

0.8 GB

3.3 GB

CRRES

33.3

DE

20.5

176.9

FAST

29.1

Geotail

11.2

GOES

1.6

Ground-based

5.9

Hawkeye

2.6

IMAGE

85.3

73.2

IMP 8

4.1

19.9

ISEE

4.4

ISIS 1&2

16.5

193.0

LANL

4.8

MAGSAT

1.8

Polar

236.7

SAMPEX

5.2

43.8

Ulysses

 4.4

5.4

Voyager

1.5

Wind

22.8

6.4

Other

2.8 *

4.7 **

Totals

454.3

567.6


* Includes <1GB/spacecraft from Cluster, Equator-S, Interball,Ohzora, SOHO

**  Includes <1Gb/spacecraft from AE-C,-D,-E, AEROS, Alouette, ARCAD, Explorers 22 and 31, Galileo, Helios 1 and 2, Hinotori, Mariner 10, Pioneer 10 and 11, Prognoz 6, 7, and 9, San Marco, SNOE, and several additional Soviet spacecraft.

 

Table 6.  Counts of Volumes at NSSDC Archive
on December 31, 2001

Astro

Space

Planetary

Earth

Physics

Physics

Science

Science

* Total

----------

----------

-------------

----------

-------

         

4-mm Tape

20

97

1

8

126

8-mm Tape

190

510

74

0

775

9-Track Tape

559

5,526

11,504

25,836

43,618

3480 Tape Cartridges

387

2,182

666

1,756

5,088

DLT

176

35

0

0

211

CD-ROM (Titles)

43

350

1,082

3

1,559

CD-WO

518

12,823

1,598

0

14,945

DVD

0

16

3

0

19

12" WORM

0

54

0

0

56

M-O Disk

0

215

0

0

215

Floppy disk

0

41

6

33

80

Totals

1,893

21,849

14,934

27,636

*66,692

Backup volumes not included
* Additional 380 volumes managed not attributible to these 4 disciplines

 

Table 7.  Photographic Data Products at NSSDC by Discipline

Micro

Micro

Film

Film

Discipline

film

fiche

(feet)

(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

20,195

14,669

4,640

4,379

41,509

Communications

183

Other

162

Totals

31,284

39,538

152,154

696,026

259

41,535


 

Table 8.  Data Arriving at NSSDC During 2001

Astrophysics

Planetary

Space Physics

ADC

1.2 GB

Mars Global Survyr

85.7

 

ACE

32.9 GB

EUVE

83.6

Galileo

1.9

 

FAST

662.4

     

IMAGE

115.8

FUSE

300.6

Pioneer Venus

36.7

 

IMP-8

2.3

IUE

72.1

Voyager

47.0

   

SWAS

0.5

 

 

ISIS

47.6

Wind

2.5

   

ISTP

 
     

   KP’s

133.4

HEASARC *

980.

   

    Geotail L0

206.3

     

    Polar L0

270.3

     

    Wind L0 +

40.2

     

    Cluster

192.4

     

Sakigake

0.6

     

SAMPEX

16.1

     

SNOE

0.2

     

Ulysses

7.9

       

Subtotal

1440

Subtotal

171

 

Subtotal

1728

       
       

Grand Total

3339 GB

     

*  The HEASARC data are from many missions and replaced much earlier-provided HEASARC data.

•  46 new data sets from 22 experiments began arriving in 2001 

•  First data from 17 experiments began arriving in 2001


Table 9.  Media Arriving at NSSDC During 2001

Astro-

Space

Planetary

Physics

Physics

Science

Total

----------

----------

-------------

-------

       

4-mm Tape

0

23

0

23

8-mm Tape

 85 

0

0

85

9-Track Tape

0

1

0

1

3480

0

17

0

17

CD-ROM (Titles)

0

95

272

367

CD-WO

111

2,652

29

2,792

Magneto-Optic Disk

0

23

0

23

DVD

0

16

0

16

DLT

118

0

0

118

Video

0

1

0

1

Total

314

2,828

301

3,443

 

Table 10.  Annual Access Statistics for Special Space Physics Systems

1999 

    2000   

                         

2001

CDAWeb

68,127/26,558 *

88,642/33,234

100,199/59,965

OMNIWeb

9,203/3,349

9,129/2,606

11,123/9,404

COHOWeb

1,299/468

1,144/202

2,954/633

ATMOWeb

2,774 **

1,715/525

2,185/518


* For first three rows and the 2000-1 columns of the fourth row, the 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.

** 1999 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 11.  2001 Access Statistics to Geophysical Models and Ephemerides Services

Geophysical Models

 
   

         International Reference Ionosphere

29,802

        MSIS Atmospheric Model

30,376

        International Geomagnetic Reference Field

30,568

             (includes Corrected Geomagnetic

 

              Coordinate Transformations)

 

        Tsyganenko 1989, 1996 Magnetic Field

6,105

        Trapped Particles

2,238

 

        Total, Geophysical Models

99,086

   

Satellite Situation Center/SSCWeb

 

        (magnetosphere and near-magnetosphere

 

           spacecraft orbits)

 
 

        Plots

19,945

        Tabular and “Query”

19,358

 

        Total, SSCWeb

39,303

   

Heliocentric Spacecraft, Planets, Comets Orbits

7,553


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

 

Table 12.  Number of Files Downloaded via FTP  

1998

1999

2000

2001

               
Photo_Gallery  
504,000
 
1,381,000
 
1,918,000
 
2,888,000
   
 
 
 
 
 
 
 
Spacecraft_Data  
10,000
 
113,000
 
76,000
 
155,000

     (= “COHO” through 1998)

 
 

Geophysical Models

 

N/A

N/A

N/A

         

95,000

 
All Others on nssdcftp  
151,000
 
229,000
 
290,000
 
195,000

 

 

 

 

 

 

 

 

 

CDF'd data on cdaweb

 

N/A

N/A

N/A

201,000

 
 
 

Total

 

665,000

       

1,723,000

2,284,000

3,534,000


  Table 13.  NSSDC User Community (Offline Requests Only)
[CY 2001]

Affiliation Category

Total Requests

Percent of Total

----------------------------

---------------------

----------------------

No Affiliation [General Public]

273

29.7

Non-US

237

25.8

US Universities/Colleges

103

11.2

US Private Industry

57

6.2

NASA/GSFC

154

16.8

NASA Centers, Excluding GSFC

59

6.4

Other Government Agencies

23

2.5

Miscellaneous

13

1.4

Total

919*

100

* Requests for 7,753 Milky Way posters and 999 COBE posters are not included in this total.  Note that this poster request level tripled between 2000 and 2001!

Table 14.  Number of Requests for Offline Satellite Data
from NSSDC by Discipline *

Data Set

Data Set

Requests

Requests

Discipline

1968 - 2001

2001

--------------

---------------

-------------------

   

Astrophysics

11,229

297

Earth Science

7,132

2

Planetary Science

45,723

1,394

Space Physics

8,789

357

Ephemeris

88

1

Other

20

0

Total

72,981

2,051

*  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 15.  NSSDC Offline Data Dissemination Statistics
as of December 31, 2001

Offline

1997

1998

1999

2000

2001

----------

------

------

------

------

------

         

Number of requests for CDs

1,297

1,079

1,013

632

433

Number of CDs mailed

6,220

6,825

7,014

4,387

2,241

Number of film requests

192

300

230

240

111

Number of film volumes ailed

2,383

2,353

1,520

6,573

2,494

Number of videotape requests

168

98

Number of videotapes mailed

231

280


Table 16.  JEDS Database Statistics for CY 2001

Number of Records

Number Added

Subpartition

as of 12/31/00          

in 2001

   

Spacecraft

5,814

70

Experiment

5,054

29

Data Set

5,059

137

Totals

15,695

267

Number of spacecraft with experiment records  -  1,001
Number of experiments with data sets at NSSDC  - 1,301

 

Table 17.  TRF (Bibliographic) Partition Statistics
as of December 31, 2001

Total Number of Records

 

43,056

   

Number of Records Inserted in 2001

 

971

 

Table 18.  JRAND Partition Statistics
as of December 31, 2001

Record Type

Total Records

Records Inserted

Records Updated

Personnel

57,108

581

2,482

Request

82,519

915