Air carrier dispatcher reported missing an alternate airport requirement; attributing the error to b...

Narrative:

Prior to reaching top of climb; while reviewing my flights in the air; I realized that I had missed an alternate on this flight. The taf had changed after dispatch; but prior to departure. I advised the crew via ACARS; and ran numbers with the current projected fuel at his next fix (ca stated 6000 lbs; FL290). I was unable to add ZZZ as an alternate until I ran numbers with the actual payload of 9300 lbs (rounded up 200 lbs for any margin of error) I sent ZZZ weather via ACARS and amended the flight prior to top of climb.the reason this was missed by me was that I was becoming increasingly ill with a stomach virus since the late evening hours. I was actually feeling very nauseous and was trying my best to complete my shift. I have heard that we receive a negative attendance hit for leaving early due to 'failure to complete shift;' and I did not want to risk receiving this.

Original NASA ASRS Text

Title: Air carrier Dispatcher reported missing an alternate airport requirement; attributing the error to being ill and not wanting to leave due to a company 'negative attendance' policy.

Narrative: Prior to reaching top of climb; while reviewing my flights in the air; I realized that I had missed an alternate on this flight. The TAF had changed after dispatch; but prior to departure. I advised the crew via ACARS; and ran numbers with the current projected fuel at his next fix (CA stated 6000 lbs; FL290). I was unable to add ZZZ as an alternate until I ran numbers with the actual payload of 9300 lbs (rounded up 200 lbs for any margin of error) I sent ZZZ weather via ACARS and amended the flight prior to top of climb.The reason this was missed by me was that I was becoming increasingly ill with a stomach virus since the late evening hours. I was actually feeling very nauseous and was trying my best to complete my shift. I have heard that we receive a negative attendance hit for leaving early due to 'failure to complete shift;' and I did not want to risk receiving this.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1421121
Time
Date	201701
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Dispatcher
Qualification	Dispatch Dispatcher
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Air carrier dispatcher reported missing an alternate airport requirement; attributing the error to being ill and not wanting to leave due to a company 'negative attendance' policy.