<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 11:20:00.000"
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="1 8 0 0 0 0 0 0 0 55 0 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" >
2026.02.06 (037) 11:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603702061120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="21" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.676" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.560" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.800" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="135.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="135.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="109.609" Name="h`E" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" 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="2.762" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.083" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
150.000 150.000 145.000 145.000 140.000 140.000 140.000 140.000 135.000 151.667 168.333 185.000 201.667 218.333 235.000 240.000 240.000 240.000 245.000 250.000 250.000 255.000 255.000 260.000 260.000 265.000 265.000 267.500 270.000 270.000 270.000 275.000 276.250 277.500 278.750 280.000 280.000 285.000 285.000 282.500 280.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 297.500 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 340.000 340.000 340.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 380.000 380.000 385.000 385.000 395.000 400.000 400.000 405.000 415.000 415.000 415.000 425.000 430.000 430.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 465.000 469.001 473.607 478.965 485.275 492.817 501.991 513.389 527.934 547.136 573.658 612.672
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 69 66 63 54 0 54 51 0 0 0 0 0 51 48 48 57 60 54 54 51 54 51 54 48 54 48 54 57 60 54 0 0 0 0 60 48 54 0 60 63 0 60 0 51 60 57 0 48 45 0 57 54 0 60 60 57 60 57 54 57 57 57 60 60 54 57 45 51 54 0 0 0 54 60 57 63 63 63 54 63 57 63 60 66 66 66 66 66 60 63 66 66 63 63 63 60 51 60 57 57 57 57 57 60 60 63 63 63 63 63 60 60 60 60 60 54 57 51 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.953125 1.171875 -1.171875 -2.734375 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 -2.734375 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
109.609 114.228
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="22">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.57 90.0 91.0 92.0 93.0 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23508865 0.9467498 1.3293064 1.5705794 1.7613875 1.9221829 2.0616763 2.184429 2.2932444 2.389929 2.4757721 2.5516608 2.6182914 2.6761663 2.7256815 2.7671478 2.8007886 2.826784 2.8452652 2.85632 2.86

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="1" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.86" PeakHeight="110.0" Num="3" Error="0.0">
-30.075 12.526 -2.881
</ShiftedChebyshev>
</ShiftedChebyshevList>
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
