<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 02:20:00.000"
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) 02:20:00</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">
FF202602801280220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="18" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.650" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.380" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="292.152" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.327" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 235.000 240.000 241.250 242.500 243.750 245.000 248.333 251.667 255.000 257.500 260.000 260.000 260.000 250.000 255.000 257.500 260.000 262.500 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 270.588 271.176 271.765 272.353 272.941 273.529 274.118 274.706 275.294 275.882 276.471 277.059 277.647 278.235 278.824 279.412 280.000 285.000 290.000 300.000 302.500 305.000 305.000 304.000 303.000 302.000 301.000 300.000 300.000 297.500 295.000 295.000 292.500 290.000 290.000 290.000 285.000 280.000 280.000 280.000 285.000 265.000 260.000 255.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 257.500 260.000 250.000 255.000 260.000 260.000 260.000 260.000 260.000 261.667 263.333 265.000 270.000 272.500 275.000 275.000 275.000 278.333 281.667 283.187 285.202 288.001 292.152 298.946 312.090 348.289
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 0 0 0 0 72 0 0 69 0 66 66 69 69 0 69 0 63 66 0 66 0 57 0 0 69 0 0 0 0 0 69 63 0 63 0 0 0 66 0 0 0 66 60 54 60 0 57 54 0 54 0 0 57 57 57 57 60 57 63 0 75 0 63 0 54 66 54 60 69 63 69 57 63 63 60 66 66 0 63 69 69 63 60 63 63 63 0 0 60 54 0 63 0 60 0 0 57 0 60 57 57 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 -1.171875 0.390625 0.390625 1.171875 1.171875 -1.171875 1.171875 0.390625 0.390625 -0.390625 1.171875 0.390625 -1.171875 1.171875 -0.390625 -1.171875 -0.390625 0.390625 1.953125 1.171875 1.953125 1.171875 1.953125 -0.390625 2.734375 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 1.953125 1.953125 -1.171875 -1.171875 1.953125 2.734375 -1.171875 -1.171875 1.953125 -0.390625 2.734375 -0.390625 -1.953125 1.953125 -1.953125 -0.390625 1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -0.390625 2.734375 -1.171875 0.390625 1.171875 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.953125 0.390625 -0.390625 -1.953125 -0.390625 1.953125 -1.171875 0.390625 1.953125 0.390625 1.953125 1.953125 1.171875 2.734375 0.390625 0.390625 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
