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 5 
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