Hmmm, okay let´s make this simple:

Dear NASA:

On 4/17/04 we were unable to views the C2 data at the perihelion of Comet F4.

On the one hand you declare an unfortunate gap in the data as follows:

http://lasco-www.nrl.navy.mil/observations/2004/obs20040419.html

2004/04/17

05:08 - 20:54 UT Data Gap.

However you likewise posted files at:

ftp://lasco6.nascom.nasa.gov/pub/lasco/lastimage/level_05/040417/c2/

Could we please inspect this single file:

23175795.fts 2004/04/17 22:42:07 C2 25.1 512 512 20 1 Orange Clear Normal 0.0000 3756