<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 02:30:00.000"
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" >
2026.02.24 (055) 02:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605502240230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="18" >
<URSI ID="00" Val="8.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.452" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="8.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="321.645" 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="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="5.318" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 225.000 230.000 240.000 243.000 246.000 249.000 252.000 255.000 255.000 255.000 255.000 252.500 250.000 247.500 245.000 246.250 247.500 248.750 250.000 245.000 245.000 240.000 242.500 245.000 245.000 245.000 245.000 247.500 250.000 252.500 255.000 260.000 260.000 260.000 260.000 266.250 272.500 278.750 285.000 290.000 293.333 296.667 300.000 302.500 305.000 315.000 325.000 324.483 323.966 323.448 322.931 322.414 321.897 321.379 320.862 320.345 319.828 319.310 318.793 318.276 317.759 317.241 316.724 316.207 315.690 315.172 314.655 314.138 313.621 313.103 312.586 312.069 311.552 311.034 310.517 310.000 310.491 311.065 311.744 312.560 313.560 314.813 316.430 318.595 321.645 326.262 334.070 350.123
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 0 69 0 0 72 72 72 66 0 69 66 0 63 0 0 0 0 0 60 69 63 60 0 66 69 63 69 63 66 0 66 66 60 63 0 60 63 54 57 60 0 0 57 60 51 51 51 0 0 0 0 0 51 51 51 54 51 0 0 60 57 57 57 63 54 0 57 0 60 60 60 63 63 63 60 66 63 63 69 63 66 63 66 0 0 0 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 0.390625 0.390625 -1.171875 1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.171875 -0.390625 -0.390625 -1.171875 1.171875 -1.171875 -1.171875 -0.390625 1.171875 -0.390625 -0.390625 -2.734375 1.171875 -0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 2.734375 1.953125 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 1.171875 1.171875 1.171875 -0.390625 0.390625 -2.734375 1.171875 1.953125 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 1.171875 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 2.734375 2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
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