EnviroNET is a service/facility that provides users with on-line, dial-up technical information concerning environmental conditions likely to be encountered by instruments and experimental arrangements carried aboard spacecraft. EnviroNET incorporates at present a combination of expository text and numerical tables amounting to about two million characters (bytes), plus FORTRAN programs that model the space environment. The topics covered are presented in viewgraph form and include the following: advantages of EnviroNET; thermal and humidity; vibration and acoustics; electromagnetic interference; loads and low frequency dynamics; microbial and toxic contaminants; molecular contamination; natural environment; orbiter motion; particulate environment; surface interactions; spacecraft anomalies; and interactive graphics facility

Vansant, Tim

English

NASA Technical Reports Server

N93-26898
ENVIRONET
Tim VanSant
National Aeronautics and Space Administration
Goddard Space Flight Center
Greenbelt, Maryland 20771
SPACE ENVIRONMENT INFORMATION
EnviroNET is a service/facility that provides users with on-line, dial-up technical
information concerning environmental conditions likely to be encountered by
instruments and experimental arrangements carded aboard spacecraft.
EnviroNET incorporates at present a combination of expository text and numerical
tables amounting to about two million characters (bytes), plus FORTRAN programs
that model the space environment.
ADVANTAGES OF ENVIRONET
CENTRALIZED COMPUTER-BASED INFORMATION ON
NATURAL AND INDUCED ENVIRONMENTS
BASED ON MEASURED DATA (SHUTTLE) AND EMPIRICAL
MODEL VALIDATED BY DISCIPLINE PANELS
L,
FOR SCIENTISTS' AND ENGINEERS' USE IN THE DESIGN AND
DATA ANALYSIS OF FLIGHT HARDWARE
CURRENCY MAINTAINED BY NASA THROUGH COOPERATIVE
EFFORTS OF INDUSTRY, OTHER GOVERNMENT AGENCIES,
THE EUROPEAN SPACE AGENCY, ACADEMIA, AND
THE NASA COMMUNITY
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https://ntrs.nasa.gov/search.jsp?R=19930017209 2020-03-17T05:42:15+00:00Z
AREAS OF CONCERN FOR USERS ARE INCLUDED
IN THE MAIN TOPICS
MAIN TOPICS
- INTRODUCTION
• THERMALAND HUMIDITY
• VIBRATION AND ACOUSTICS
• ELECTROMAGNETIC INTERFERENCE
• LOADSAND LOW FREQUENCY DYNAMICS
• MICROBIAL AND TOXIC CONTAMINANTS
• MOLECULAR CONTAMINATION
• NATURAL ENVIRONMENT
• ORBITER MOTION
• PARTICULATE ENVIRONMENT
• SURFACE INTERACTIONS
• SPACECRAFT ANOMALIES
• INTERACTIVE GRAPHICS FACILITY
94
NASA MARS WORKING GROUP
I
! I
NASA MARS
WORKING GROUP
CHAIRMAN:
MEMBERS: LeRC GSFC JSC
I_aRC MSFC JPL
NATURAL AND INDUCED I
ENVIRONMENT8 |
PANEL I
(OTHER NASA TBD)*
EX OFFICIO: PANEL CHAIRMEN
ADJUNCT GROUP
(OUTSIDE NASA)
EX OFFICIO:
DOD
NOAA
INDUSTRY
ACADEMIA
EUROPEAN SPACE AGENCY
OTHERS AS REQUIRED
, ] ,
l USER l INFORMATION
PANEL MANAGEMENT
PANEL
FUNCTIONS OF THE NATURAL AND INDUCED ENVIRONMENTS PANEL
• GATHER DATA
MAKE PRELIMINARY ASSESSMENTS OF RELIABILITY
AND TRACEABILITY OF DATA
PROVIDE GUIDELINES FOR MEETING PAYLOAD
INTEGRATION REQUIREMENTS
. ACCESS STATE-OF-THE-ART-DATA FOR FEASIBILITY
95
THE NATURAL AND INDUCED ENVIRONMENTS PANEL
NATURAL AND INDUCED ENVIRONMENTS
PANEL
LOADS AND
LOW-
FREQUENCY
DYNAMICS
VIBRATION
AND
ACOUSTICS
PARTICULATE
ENVIRONMENT
NATURAL
ENVIRONMENT
ELECTRO- MOLECULAR
MAGNETIC CONTAMINA-
INTERFERENCE 'lION
SURFACE
INTERACTIONS
INFORMATION MANAGEMENT
The Information Management Panel provides
the database structure and manages the database.
Duties: Create a system for compiling, storing,
and cataloging the information in the database;
edit information; and coordinate network activities.
96
INFORMATION MANAGEMENT PANEL
INFORMATION
MANAGEMENT
PANEL
I
SEARCH
I
INFORMATION
OPERATIONS
I I
I INTERNA-
TIONAL
INFORMATION
EXCHANGE
I I
SCIENCE
LIAISON
SOFTWARE
I
The scope of the interactive models is shown below.
This activity has been advanced by adding interactive
models of the natural environment. The models include
neutral atmosphere density and temperature,
ionosphere, electron temperature and density, the
magnetic field vector, and energetic particle or
radiation flux. These models are based on data from
satellites which orbit the earth in the thermospheric and
exospheric regions of the atmosphere.
97
INTERACTIVE MODELS
MARSGRAM*
MSIS*
MET*
IRI*
IGRF*
CREME
TOTAL DOSE*
(Mars Global Reference Atmospheric Model)
(Mass Spectrometer Incoherent Scatter
(Marshall Engineering Thermosphere)
(International Reference Ionosphere)
(International Geomagnetic Reference Field Model)
(Cosmic Ray Effects on Microelectronics)
(Orbital Radiation Dose Analysis Package)
ENERGETIC PARTICLES*
RADIATION BELTS
SOLAR FLUX
ORBITAL DEBRIS*
METEOROID*
ORBITAL DECAY
THERMAL ANALYSIS
*Suitable for orbit integration
ENVIRONMENT MODELS
PROVIDE A READILY ACCESSIBLE METHOD TO DO QUICK,
ACCURATE CALCULATIONS.
ENCOMPASS MANY IMPORTANT ENVIRONMENTS FOR
ENGINEERS,
A USER-FRIENDLY, INFORMATIVE INTERFACE IS STANDARD
ON ALL ENVIRONET MODELS.
ALL MODELS HAVE A POP-UP HELP WINDOW WHICH GIVE MORE
INFORMATION ON MODEL INPUTS, OUTPUTS AND CAVEATS.
PERMIT UPLOADING AND DOWNLOADING OF LARGE
DATA FILES.
98
MODEL HELP WINDOW
ilXLP
_ene outlmt files are naned "I_." and nay be vieved or dovn-
loaded _ing the options available. These files rill be deleted atter
exiting the IGP_ model, 8o plene dmmload whatever data you vish to
nv, before doing so.
6) Longitude .............
7) kltitudo ..............
i) Year ..................
9) Output Option .........
-360.0 to 360.0 degrees
0.0 to 30000.0 kilcBeters
1940 to 2000
0 or 1
m [k]hoad Help [B]ack Help [l]xit Help 1
SOLAR ACTIVITY DATA AND PREDICTIONS
PRODUCES DAILY AVERAGES OF Ap AND Kp ACTIVITY
WHICH ARE NEEDED FOR MOST ATMOSPHERE AND
MAGNETOSPHERE MODELS.
DATA FILES SPAN FROM 1940 TO 2011 AND ARE
PERIODICALLY UPDATED.
• HISTORICAL DATA SUPPLIED BY ARRANGEMENT WITH NOAA.
PREDICTIONS SUPPLIED BY ARRANGEMENT WITH
NASAJGODDARD SCIENTIST DR. KENNETH SCHATTEN.
99
Historical Data file contains data up until [
5-30-89 lPredicted Data is recorded monthly
Input Para_tars
Year, .................... 2000
Month................... 6
l_ you want to (R)un the made] with the cu_nt values, change somethrough 3) or 1A)II the values, or (Q) lt_
COSMIC RAY EFFECTS ON MICROELECTRONICS MODEL
CALCULATES THE LINEAR ENERGY TRANSFER (LET) SPECTRA FOR
A CHOSEN RANGE OF ELEMENTS, FOR ANY ORBIT.
CALCULATES THE SINGLE-EVENT UPSET (SEU) RATE DUE TO THE
LET SPECTRA AND PROTON REACTIONS OUTSIDE THE SPACECRAFT,
GIVEN PARAMETERS OF THE PART OF INTEREST.
INCLUDES THE EFFECTS OF SOLAR FLARES, GEOMAGNETIC CUTOFF,
AND TRAPPED PROTONS.
100
CREME MODEL
Conic Ray lftects on ]/icroelectronics (CRBMB)Model
by Canes H. _lamj Jr. 0 N.R.L., (301) 767-2747
eo._et_'c Subaod,lThis progr_ colputeJ the g transnlnalon function for a given orbit.
[?] tor help at any tim
In_t PerReters
1) Include Earth shadov? .... y
2 ] )tagnatlc weather cood .... s
4) hit. at ........ 550
51 Orbital inclination ...... 28.5
6) Initlal long of asc node.O
7) Init. diap. of asc node.,O
S) Perig dlepl, fr sac node.
Input ltenge
(Y)ee or (s)o
(S]t_ray or (Q}uiet
in kiloNCera
in kilomtare
-90 to 90 degrees
0 to 360 degrees
0 to 360 degrees
0 to 360 degrees
[_1 you vent to (R)un the model vith the current values, change eoaethrough |1 or (A)ll the va uu, or (Q) it?
MARSGRAM
. AN ENGINEERING MODEL ATMOSPHERE FOR MARS.
LOWER ATMOSPHERE DATA BASED ON ACTUAL MEASUREMENTS
MADE BY MARINER AND VIKING SPACECRAFF.
SIMULATES EFFECTS OF SEASONAL AND DIURNAL VARIATION,
DUST STORMS, AND CO 2SUBLIMINATION/CONDENSATION ON
SURFACE PRESSURE.
RANDOM PERTURBATION PROFILES FOR DENSITY VARIATIONS
ALONG SPECIFIED TRAJECTORIES.
101
MARSGRAM MODEL
THE MARS GLOBAL ATMOSPHERIC MODEL
VERSION 2.22 -- NOVEMBER 16, 1989
*** Hit ['/] for help at any time ***
Input Parameters Inpu* Ranges
I) Year .............................................. 19'/7 1900 to 2100
2) Month ........................................... 10 I to 12
3) Day ............................................... _0 I to 31
4) Hour ............................................. 10 0 to 23
5) Minute .........................................20 0 to 59
6) Second ........................................0 0.0 to 59.0
7) I.,$= 201.79 degrees.......... 200 180.0to 320.0de_ees
8) Storm Inlmsity.................... 2 0.0 to 3.0
9) FI0.7 crn flux at IAU ........... I00 50.0 to 450.0 (10'*'-22W/ m^2) / H z
I0) Standard Deviation............... 0 -3.0 to 3.0 (IOA-22W /m"2) / Hz
11) Random Numb= Seed........... I I to 29999
I 12) X-Co4e 13) Y-Code 14) Scale 15) Positions 16) Lat 17} Lon18) Height 19} Height inc. 20} Lat inc. 21) Lon inc. 22) Time inc.
Do you want a dust storm? [¥ \ N|
l LS is the measure of the seasonal period of Mars.
MARSGRAM MODEL
THE MARS GLOBAL ATMOSPHERIC MODEL
VERSION 122 -- NOVEMBER 16, 1989
*** Hit [?] for helpat anylime ***
InpuL P_rneters Input Ranges
12) X-code 1 1, 2, 3, 4, 5, 6, 7, or 8
13) Y-code 1 O, 1, 2, 3,4, 5,6.7. or 8
14) Scale for plot files 1 0 or 1
15) Number of positions i 0 0 or 3200
16) l._im& (des) 0 -90.0 to _).0 degree*
17) l..xmgitude (deg) 0 -360.0 to 360.0 degrees
18) Height = 0.401un 50 0.0 to 9999.99 km
19) Hei@t ino'em¢_ 10 0.0 to 1000.00 kxn
20) Lat mere_e_t t -90.0 to 90.0 degree5
21) Lon increment 0 -360.0 to 360,0 degrees
22) Tzme increment 10 0.0 to 3600.0 seconds
[ 1) Year 2} Month 3} Day 4) Hour 5) Minute 6} Second 7) LS
18) Storm Intensity 9) FI0.7 Flux I0) Std. Deviation 11) Seed
I Do you want to [R]un the model with the current values, change [A]II values [or s me of the values [i] - [22], [T]oggle screen, or [E]xit ? I
......... II !
102
MARSGRAM MODEL
THE MARS GLOBAL ATMOSPHERIC MODEL
VERSION 2.22 -- NOVEMBER 16, 1989
*** Hit [7] for help at any time ***
Input Parameters Input Ranges
12) X-code 1 1, 2, 3,4, 5,6. 7.or 8
13) Y-code 1 0, 1, 2, 3,4,5, 6, 7, or 8
14) Scale for plot files 1 0 of I
15) Number of positions 10 0 or 3200
16) Latitude (deg) 0 -90.0 to 90.0 de_'ees
17) Longitude (deg_ N _ _ap 360.0 degrees
18) Height = 0.40| The followlng files have been created: |9999.99km
19) HeiSt incremel[ |1000.00 km
20) Latt.nctementl HARSLIST.0xxx LOWDENS.0xxx MINTEMP.0xxx _90.0degrccs
21) Lon mcreme_nt[ MARSOUT. 0xxx HIGHDENS. 0xxx MAXTE_. 0xxx _ 360.0 degrees : ::
22) Tune mc_mc_t[ EASTWIND. 0xxx AVGDENS. 0xxx AVGTEMP. 0xxx _.0 _c0n_
[ NRTHWIND.0xxx VARDENS.0xxx TEMPERTR.0xxx 1
1) _ear 21 Mot'PlCSS_'O_=_x 1_. Ls J8) Storm Intensl_ z _, ........... , ................ , Seed
Do you want to [R]un the model with the current values, change [A]11 valuesor s _e of the values [l] - [22], [T]oggle screen, or [E]xlt ?
EXPERT SYSTEMS
• Provide an effective method of saving corporate knowledge.
Allow computers to sift through large amounts of data
and pinpoint significant parts.
Use heuristics for predictions instead of algorithms.
- Approximate reasoning and inference.
- Able to attack problems not rigidly defined.
103
PROPOSED EXPERT SYSTEM FOR ELECTRICAL
AND CHEMICAL INTERACTIONS ON MARS
!
=
Surface
Data
i ,,,
Interface
(Driver screen
manager)
Charged
Particles
Data
Electrical
Discharge
Data
Environmental
Models
Radiation
Environment
- I I n _l
I
Data Access IProcedures
Knowledge
Base
(RULES)
CLIPS*
Forward Chaining Inference
Engine
OUTPUT:
Risk/Benefit Analysis
*C-Language lntcgralcd Production Systcm (NASA/JSC)
104
The proposed model access and organization
is shown below
MODEL ACCESS
Models in
Fortran or C-Language
IntemcUve Graphics
k ,,:==n_==- J = ='2_ :.:-_::=i::::;=
Input/Output Screen Tables Graphical Display
105



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