<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 03:00:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.03.07 (066) 03:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603070300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.669" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.335" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="290.000" 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="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="290.147" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.657" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.769" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="18.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.156" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="24.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 305.000 300.000 310.000 300.000 290.000 290.000 287.500 285.000 282.500 280.000 277.500 275.000 275.313 275.625 275.938 276.250 276.563 276.875 277.188 277.500 277.813 278.125 278.438 278.750 279.063 279.375 279.688 280.000 280.313 280.625 280.938 281.250 281.563 281.875 282.188 282.500 282.813 283.125 283.438 283.750 284.063 284.375 284.688 285.000 287.500 290.000 290.000 291.071 292.143 293.214 294.286 295.357 296.429 297.500 298.571 299.643 300.714 301.786 302.857 303.929 305.000 300.000 300.000 295.000 290.000 280.000 280.000 325.000 330.000 330.227 330.455 330.682 330.909 331.136 331.364 331.591 331.818 332.045 332.273 332.500 332.727 332.955 333.182 333.409 333.636 333.864 334.091 334.318 334.545 334.773 335.000 320.000 315.000 306.667 298.333 290.000 300.174 321.813
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 54 0 0 51 54 0 60 0 0 0 69 66 66 0 66 0 0 63 0 66 0 0 0 0 0 0 0 0 54 0 60 0 63 0 0 0 0 57 0 0 0 0 60 0 0 63 0 0 0 0 54 0 60 0 0 0 0 0 0 57 57 57 0 0 57 0 57 60 57 0 54 51 0 48 0 0 54 0 0 0 0 0 0 54 0 48 0 0 0 54 57 60 0 0 63 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -1.171875 -0.390625 1.953125 1.171875 -0.390625 -0.390625 -0.390625 1.953125 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 1.171875 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.171875 -0.390625 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 2.734375 1.953125 -1.171875 -1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 -1.171875 1.953125 -0.390625 1.953125 0.390625 -2.734375 -0.390625 -1.953125 -1.171875 2.734375 -1.953125 0.390625 -0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="72">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.632 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 185.265 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.897 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 290.147 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.296 0.267 0.227 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.219 0.24 0.26 0.281 0.301 0.322 0.342 0.354 0.525 0.748 0.992 1.279 1.619 2.011 2.454 2.944 3.483 4.075 4.732 5.48 6.375 7.446 7.45 7.312 6.944 6.434 5.854 5.255 4.669 4.117 3.611 3.153 2.745 2.384 2.067 1.79 1.549 1.339 1.157 0.999 0.863 0.745 0.643 0.555 0.479 0.413 0.357 0.308 0.265 0.229

</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="7.45" PeakHeight="290.147" Num="5" zHalfNm="278.657" Error="4.998">
-52.93 -24.964 12.264 -3.069 1.449
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.897" Depth="0.154"/>
<TopsideChapman PeakHeight="290.147" PeakDensity="688616.6" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
