<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 02:40:00.000"
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 2 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.02.17 (048) 02:40:00</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">
FF202604802170240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="4.210" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="35.366" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="225.000" 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="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="215.898" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="206.328" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.230" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="14.400" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.625" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="16.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 200.000 200.000 201.250 202.500 203.750 205.000 205.000 205.000 205.000 205.000 206.667 208.333 210.000 205.000 205.000 205.000 205.000 206.000 207.000 208.000 209.000 210.000 208.333 206.667 205.000 210.000 211.250 212.500 213.750 215.000 212.500 210.000 210.000 205.000 210.000 212.500 215.000 210.000 210.000 210.000 210.000 210.000 210.000 205.000 207.500 210.000 210.000 210.000 210.000 210.000 205.000 207.500 210.000 215.000 213.333 211.667 210.000 210.000 210.000 210.000 210.000 215.000 217.500 220.000 220.000 220.000 215.000 210.000 212.500 215.000 212.500 210.000 215.000 215.000 215.000 215.000 215.000 215.000 216.667 218.333 220.000 217.500 215.000 217.500 220.000 220.682 221.364 222.045 222.727 223.409 224.091 224.773 225.455 226.136 226.818 227.500 228.182 228.864 229.545 230.227 230.909 231.591 232.273 232.955 233.636 234.318 235.000 240.000 237.500 235.000 230.000 230.455 230.909 231.364 231.818 232.273 232.727 225.000 225.000 225.000 225.000 228.035 234.609 259.557
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 0 63 0 0 0 81 0 0 0 0 0 0 66 81 0 0 78 0 0 0 0 0 0 0 0 60 0 0 0 60 0 72 66 75 69 57 60 63 75 72 81 0 84 69 0 72 78 0 0 0 51 0 0 63 0 0 78 0 0 0 69 72 0 0 0 57 0 66 0 69 0 66 78 0 75 0 0 78 0 60 72 0 75 0 72 0 0 0 0 69 66 66 0 0 0 0 60 0 0 0 0 0 60 0 0 0 57 63 0 66 57 0 0 0 0 0 0 69 75 0 69 57 0 48
</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 -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 -1.171875 -0.390625 -0.390625 -1.171875 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 1.171875 -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 1.171875 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 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 -2.734375 0.390625 -0.390625 -0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 -1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="58">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 131.0 135.0 140.0 145.0 150.0 152.0 155.0 160.0 165.0 170.0 173.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.898 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.348 0.331 0.299 0.247 0.233 0.233 0.233 0.233 0.233 0.233 0.25 0.279 0.308 0.337 0.354 0.51 0.918 1.437 2.114 2.99 4.113 5.52 7.152 8.362 8.4 8.287 7.904 7.348 6.702 6.026 5.361 4.733 4.153 3.629 3.161 2.746 2.382 2.063 1.785 1.543 1.333 1.152 0.995 0.859 0.741 0.64 0.552 0.476 0.411 0.355 0.306 0.264 0.228

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.4" PeakHeight="215.898" Num="5" zHalfNm="206.328" Error="1.44">
-36.922 -9.449 3.632 -0.246 0.087
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="63.0" Depth="0.121"/>
<TopsideChapman PeakHeight="215.898" PeakDensity="875434.25" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
