<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 01:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.28 (028) 01:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602801280100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="6.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.893" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.526" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="444.545" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.089" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="84">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 270.000 275.000 277.500 280.000 280.000 280.000 290.000 295.000 297.500 300.000 305.000 260.000 265.000 265.000 265.000 275.000 285.000 280.000 278.333 276.667 275.000 275.000 275.000 270.000 267.500 265.000 265.000 265.000 267.500 270.000 280.000 290.000 300.000 310.000 320.000 330.000 340.000 350.000 360.000 370.000 380.000 390.000 400.000 410.000 420.000 420.000 420.000 417.500 415.000 415.000 410.000 410.000 410.000 410.000 410.000 415.000 417.500 420.000 421.667 423.333 425.000 430.000 430.000 430.385 430.769 431.154 431.538 431.923 432.308 432.692 433.077 433.604 434.185 434.831 435.551 436.360 437.276 438.321 439.523 440.923 442.572 444.545
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 0 63 63 66 0 60 54 54 0 54 54 60 60 0 66 0 63 0 0 0 60 63 60 51 0 57 60 60 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 60 54 57 54 0 54 0 57 51 57 0 54 51 57 57 0 0 0 54 54 0 57 0 0 0 0 0 0 54 0 0 0 54 54 51 48 0 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 1.953125 1.171875 1.953125 1.171875 -2.734375 1.171875 1.953125 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 1.953125 1.171875 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 -0.390625 1.953125 1.953125 2.734375 -1.171875 -0.390625 2.734375 1.953125 2.734375 -0.390625 1.171875 -1.953125 -1.953125 -2.734375 -1.953125 -1.171875 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -2.734375 -2.734375 -2.734375 1.171875 -0.390625 -1.953125 -2.734375 -1.953125 -0.390625 1.171875 -2.734375 -2.734375 -2.734375 -1.953125 -1.171875 -2.734375 -1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
