<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 00:20:00.000"
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" >
2026.02.20 (051) 00:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202605102200020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="18" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.240" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.375" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.653" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="137">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 400.000 392.500 385.000 380.000 375.000 379.444 383.889 388.333 392.778 397.222 401.667 406.111 410.556 415.000 405.000 402.500 400.000 398.000 396.000 394.000 392.000 390.000 388.000 386.000 384.000 382.000 380.000 370.000 370.000 370.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 375.000 380.000 378.750 377.500 376.250 375.000 372.500 370.000 367.500 365.000 364.000 363.000 362.000 361.000 360.000 355.000 350.000 345.000 342.500 340.000 337.500 335.000 332.500 330.000 330.000 330.000 330.000 332.500 335.000 335.000 336.364 337.727 339.091 340.455 341.818 343.182 344.545 345.909 347.273 348.636 350.000 350.000 350.000 347.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 346.250 347.500 348.750 350.000 351.250 352.500 353.750 355.000 353.333 351.667 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 347.500 345.000 346.000 347.000 348.000 349.000 350.000 353.876 359.002 366.097 376.565 393.563 425.972
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 0 57 57 48 0 48 51 0 0 48 0 51 48 0 0 57 0 0 0 0 48 51 0 54 0 54 57 0 57 57 0 0 0 60 51 0 57 51 57 0 0 60 0 60 63 60 60 0 0 57 0 54 57 60 51 54 54 0 57 57 60 0 54 0 0 57 51 54 57 0 51 51 0 0 63 0 66 0 57 54 0 54 57 57 0 57 60 63 57 54 54 54 60 54 60 54 54 60 60 0 60 57 63 63 57 0 60 57 57 57 57 54 0 0 57 57 60 0 0 57 0 57 0 54 0 0 0 0 57 51 51 0 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.953125 -1.953125 -0.390625 -1.953125 0.390625 0.390625 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 0.390625 -0.390625 -2.734375 -1.953125 -1.171875 -1.953125 -2.734375 -0.390625 -1.953125 -1.171875 -2.734375 -0.390625 0.390625 0.390625 -1.171875 -1.953125 -0.390625 -1.171875 0.390625 0.390625 -1.953125 -1.953125 -0.390625 -0.390625 -1.171875 0.390625 -1.953125 -1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -2.734375 -2.734375 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 -1.953125 -0.390625 -1.953125 -1.953125 -2.734375 0.390625 -0.390625 1.171875 -0.390625 1.171875 -2.734375 -0.390625 0.390625 -2.734375 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 -1.171875 0.390625 0.390625 1.171875 1.171875 -0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 -0.390625 1.953125 1.171875 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 -0.390625 0.390625 1.171875 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -0.390625 -1.171875 0.390625 -1.953125 0.390625 1.171875 -1.953125 1.171875 -2.734375 1.171875 0.390625 1.171875 1.953125 -1.953125 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
