<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 07:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 75% PACIFIC flags: Multiple candidates for F2x cusp, Unidentified traces above foF2</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" >
2026.03.22 (081) 07:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608103220750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.579" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.968" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="295.000" 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="1.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="255.394" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.649" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.160" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="41.181" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.162" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.721" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="37.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="73">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 220.000 221.250 222.500 223.750 225.000 226.250 227.500 228.750 230.000 230.000 229.167 228.333 227.500 226.667 225.833 225.000 225.000 225.000 230.000 230.500 231.000 231.500 232.000 232.500 233.000 233.500 234.000 234.500 235.000 236.429 237.857 239.286 240.714 242.143 243.571 245.000 245.000 245.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 247.500 250.000 251.667 253.333 255.000 256.667 258.333 260.000 260.000 260.000 260.000 260.000 265.000 270.000 270.000 270.000 270.000 275.000 277.500 280.000 285.000 290.000 292.500 295.000 305.000 315.000 332.621
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 0 0 0 0 0 0 60 0 0 0 0 0 0 69 0 60 72 0 0 0 0 0 0 0 0 0 78 0 0 75 0 57 0 63 0 69 0 69 57 72 0 0 69 0 69 0 0 51 0 0 66 69 72 0 69 72 60 66 69 66 66 0 66 66 66 0 66 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="90">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.667 140.0 145.0 150.0 155.0 160.0 161.333 165.0 170.0 175.0 180.0 185.0 187.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.394 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.335 0.31 0.271 0.21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.252 0.282 0.312 0.342 0.354 0.444 0.642 0.919 1.297 1.785 2.365 2.979 3.567 4.087 4.519 4.857 5.099 5.246 5.3 5.3 5.278 5.208 5.099 4.959 4.794 4.611 4.415 4.212 4.005 3.796 3.59 3.388 3.191 3.001 2.818 2.643 2.476 2.318 2.168 2.026 1.893 1.767 1.649 1.539 1.435 1.338 1.247 1.162 1.083 1.009 0.939 0.875 0.815 0.759 0.706 0.658 0.612 0.57 0.53 0.494 0.46 0.428 0.398 0.371 0.345 0.321 0.299 0.278 0.259 0.241 0.224 0.209

</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="5.3" PeakHeight="255.394" Num="5" zHalfNm="226.649" Error="0.863">
-73.996 8.802 -4.005 0.918 -0.113
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.0" Depth="0.154"/>
<TopsideChapman PeakHeight="255.394" PeakDensity="348511.16" PeakScaleHeight="21.721" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
