Angular Looped HTTP Request Map Value to Responses

In my service class I am looping an http get request and using rxjs forkJoin to combine all the responses into an observable which I return to my component. For each response that comes back I need to add two properties to the json (readySystem which is an object and serviceType which is a string). The value of each of these is different for each iteration of the loop.

How do I keep/store/retain the values for both and and map/add them to the correct response?

With the way I've attempted to do it below, the values for both are the same in every response returned in the final observable.

  getServices() {

  for (var x = 0; x < this.service.items.length; x++ ){
        var num = Object.keys(this.service.items[x].links).length;

         for (var key in this.service.items[x].links) {
            var systemName = this.service.items[x].systemName;
            var environment = this.service.items[x].environment;
            var server = this.service.items[x].server;
            var port = this.service.items[x].port;
            var linkName = this.service.items[x].links[key];
            var serviceType = key;
            this.observables.push(
            this.http.get('http://localhost:3000/myapi/get/service?server=' + server + '&service=' + linkName)
            .map((res:Response) => { 
                var output = res.json()
                for (var obj in output) {
                    if (output.hasOwnProperty(obj)){

                        var readySystem = new System(systemName,
                         environment,
                         server,
                         port,
                         linkName);

                    output[obj].System = readySystem;
                    output[obj].serviceType = serviceType;
                    }
                }
                return output;
        })
            );
        }
        };
        return Observable.forkJoin(this.observables);
};

Update: With the suggested code changes provided in the answer below, I get output like:

0: Array(33)
1: System
    systemName: "my system"
    environment: "my environment"
    etc.
2: "myservice"
3: Array(35)
4: System
   etc.
5: "myotherservice"

However, what is needed is:

0: Array(33)
 0: Object
  > System
      systemName: "my system"
      environment: "my environment"
      etc.
   serviceType: "myservice"
 1: Object
  > System
      systemName: "my system"
      environment: "my environment"
      etc.
   serviceType: "myotherservice"
 etc.
1: Array(35)
 0: Object