Madan,
Thank you for the suggestion about notation of years. The AAT is
considering ICAS revisions in light of comments and suggestions, and
hopes to be able to address these metrication concerns in future
programming.
At the same time, other areas of development are also on the
board. One is to specify an IDC fixed unit that is fixed or derived
from the SI second:
A method for
defining a fixed tik unit based on the SI second is under
consideration. A tik may be designated as fixed from second (ffs) by
the following formula: By custom there are 86,400 seconds in a day,
and there are 100,000 tiks in a chron. A tik fixed from second (ffs)
is thus 0.864 seconds, and may be expressed as tt010 ffs. A chron that
is fixed from second may be likewise designated as t 1 ffs (equal to
86,400 seconds).
"The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom." (SI 2.1.1.3) From this a tik fixed from the second would is derived from [9,192,631,770 x 0.864 = 7,942,433,849.3] 7,942,433,849.3 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom per SI 2.1.1.3 (however calculation or application of measure is not validated). Alternately one tok (tt100) ffs (8.64 s) would be 79,424,338,493 periods per SI 2.1.1.3 (however calculation or application of measure is not validated).
"The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom." (SI 2.1.1.3) From this a tik fixed from the second would is derived from [9,192,631,770 x 0.864 = 7,942,433,849.3] 7,942,433,849.3 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom per SI 2.1.1.3 (however calculation or application of measure is not validated). Alternately one tok (tt100) ffs (8.64 s) would be 79,424,338,493 periods per SI 2.1.1.3 (however calculation or application of measure is not validated).
However at this time the AAT ICAS department must inquire into
the validity of these derivations.
Sincerely,
--
Ron Stone, programs manager
Alliance for the Advancement of Technology (AAT)
[EMAIL PROTECTED]
http://www.aatideas.org
AAT at www.aatideas.org
PO Box 141155
Alliance for the Advancement of Technology (AAT)
[EMAIL PROTECTED]
http://www.aatideas.org
AAT at www.aatideas.org
PO Box 141155
Mpls., MN 55414-1155
USA
