<div>Dear Grads users,</div><div><br></div><div>I need help about to use function of grads;</div><div><span style="background-color:rgb(255,255,255);color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px"><br>
</span></div><div><span style="background-color:rgb(255,255,255);color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px">I want to convert the ref (dbz) to Rain (mm/hr)</span></div><div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
by using Z-R correlation formula, as below :</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
'R=pow((pow(10, ref/10))/200,5/8)',</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
Then I want to accumulate the rainrate for 1 hour,</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">I use this formula :</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
<br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">'R1=sum(R, t=1, t=15)'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
'd R1'</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><font color="#222222" face="arial, sans-serif"><span style="white-space:nowrap"><br>
</span></font></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">But I got strange result.</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
<br></div></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">The value of R1 much larger than the value of ref..</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
what can I do?</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
thank you before...</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
Best regards,</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">wendi</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
<br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
<br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.666666984558105px;background-color:rgb(255,255,255)">
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