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 |