sta  sta_std  net_integ_prod  integ_std_error  integ_dark_respir  integ_dark_error  
1    N1       608.95          nd               nd                 nd                
2    N2       139.43          8.20             -124.13            7.31              
4    N4       36.56           7.66             -126.70            9.66              
6    N6       43.18           nd               -66.09             10.28             
7    N7       105.39          nd               nd                 nd                
9    N9       2.55            7.61             -78.70             8.82              
11   N11      180.40          10.37            -105.26            nd                
13   S11      81.43           8.65             nd                 nd                
15   S13      44.09           8.17             -116.27            16.40             
17   S15      261.44          13.74            nd                 nd                
20   S9       455.90          11.48            -100.06            9.88              
22   S7       314.74          nd               nd                 nd                
27   S4       125.74          7.24             nd                 nd                
27   S4       158.30          6.87             nd                 nd                
28   S3       200.63          7.38             -74.72             5.47              
29   S2       63.90           7.36             nd                 nd