RELEASE AND RECORDER RECORD B4-25 
above the humidity portion of the record, the pressure contact values 
should be verified by recording the descent tothe recurrence of the hu- 
midity traces. Classification of the data will be as follows: 
a. 
If the continuous temperature trace is not more than 100 mbs 
in extent from the surface to 200 mbs and 50 mbs in extent 
from 200 mbs to termination, the stratum will be regarded 
as accurate. 
When it exceeds the limits in (a) above and no level is re- 
quired for temperature change, the stratum will be regarded 
as accurate. 
When it exceeds the limits in(a) above and a level is required 
for temperature change, the stratum will be regarded as 
doubtful. 
NOTE: After the radiosonde has ceased to switch for fifteen min- 
utes and minimum height requirements have not been attained, 
another instrument should be prepared for baseline. If it appears 
that the radiosonde will continue to fail to switch and time allows 
for another release, the observation should be terminated at the 
last known contact and another release made. 
d. 
LON S158) 
If the radiosonde should cease to switch, and thereafter only 
a continuous temperature trace is recorded, the data will be 
regarded as missing and the computations terminated at the 
top of the last contact at which switching occurred. 
If the radiosonde should cease to switch and commence again 
so that there are known contacts bounding the non-switching 
portion, data through the stratum will be evaluated as de- 
scribed in the following subparagraphs. Data within the stra- 
tum will be regarded as accurate or doubtful in accordance 
with (a), (b) and (c) above. The observation will be terminated 
whenever the doubtful stratum exceeds the limits of JB4-8.2. 
(1) Place levels on the recorder record at known contacts 
bounding the stratum of the continuous temperature trace. 
Determine the temperature and pressure of these levels. 
Enter the temperature and pressure in the normal man- 
ner on WBAN-31( ). 
(2) Draw straight dashed lines between the two levels on the 
recorder record and also on WBAN-31( ). 
FMH#3 
