12323 | Vett
J | Le J&L | l Ue J 4 |
*e.g., Am = m... (2A) - my (LA)
| hie sud |
| Aver. oim.
TABLE 13 |
INCREASE IN RMSE IN DISCREPANCIES
DUE TO SYSTEMATIC DEVIATIONS
F. COMPUTER STORAGE AND TIME REQUIREMENTS
Computer storage and time requirements are listed in Tables 14(a) and
14(b). Listed in Tobie 14(a) for sequential procedures are: (a) maximum
direct access storage; (b) average time in seconds per run for relative
orientation and for biock adjustment; and (c) total time per run in
seconds. Listed in Table 13(b) for simultaneous procedures are: (a) maxi-
mum direct access storage; (b) number of iterations to solve normal equa-
tions; and (c) average time in seconds to complete the adjustment. Times
do not reflect data preparation, use of peripheral equipment, or manual
analyses of results. Tabulated times do represent the so called "central
processor" time for which the highest rate is generally charged.
Maximum direct access Storage varies from 8.2k to 4000k words, where
word is a nominal value which can be.interpreted differently for various
computers. Times vary from 70 seconds to a maximum of 948 seconds per
adjustment.
Comparisons among procedures vith respect to time are not too meaning-
ful due to the variable characteristics of different computer systems. Un-
fortunately, no single participant performed both a sequential and simul-
taneous adjustment on the same system. Consequently, a valid comparison of
times for these two basic groups of procedures is not feasible with the data
available. Note that central processor tine for sequential procedures
varies from .7 to 7.8 seconds per photograph while simultaneous solutions
require from 1.8 to 9.5 seconds per photograph. Thus, sequential procedures
still require less time than do simultaneous methods, but the gap is closing.
Increased efficiency of solving the normal equations by iterative methods
and recursive partitioning is most probably the reason for this narrowing
gap.
Time for data preparation and analyses are not included in this
report. Insufficient data were reported to allow a meaningful analysis.
