<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 01:20:00.000"
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 2 0 0 0 0 0 0 0 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% 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</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) 01:20:00</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">
FF202606603070120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.164" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.400" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="361.579" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="340.358" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="310.436" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.854" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="44.735" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.775" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.716" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="51.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 345.000 350.000 350.000 355.000 353.333 351.667 350.000 350.000 350.000 345.000 345.000 355.000 350.000 345.000 345.000 345.000 345.000 345.000 347.500 350.000 345.000 345.000 345.000 347.500 350.000 355.000 360.000 360.000 365.000 364.375 363.750 363.125 362.500 361.875 361.250 360.625 360.000 360.000 360.000 360.000 355.000 350.000 345.000 345.000 345.000 345.000 349.110 354.428 361.579 371.708 387.165 413.655 469.540
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 66 60 60 57 51 0 57 0 57 66 66 60 0 63 0 0 0 60 0 60 0 57 54 54 54 60 54 57 60 0 0 0 60 63 66 0 60 63 0 60 0 0 60 60 60 63 57 63 51 0 57 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.953125 -0.390625 -0.390625 -1.171875 -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 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 1.953125 0.390625 1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="110">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.061 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.123 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.184 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.358 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0
</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 0.317 0.294 0.263 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.224 0.245 0.266 0.287 0.308 0.328 0.349 0.354 0.397 0.483 0.615 0.779 0.949 1.119 1.29 1.465 1.645 1.833 2.03 2.24 2.463 2.702 2.96 3.238 3.538 3.86 4.202 4.554 4.898 5.2 5.415 5.5 5.5 5.479 5.412 5.307 5.172 5.012 4.834 4.643 4.443 4.239 4.032 3.826 3.623 3.425 3.232 3.046 2.867 2.696 2.532 2.377 2.229 2.09 1.958 1.834 1.716 1.606 1.503 1.405 1.314 1.228 1.148 1.073 1.002 0.937 0.875 0.817 0.763 0.713 0.666 0.622 0.581 0.542 0.506 0.473 0.441 0.412 0.385 0.359 0.335 0.313 0.292 0.273 0.255 0.238 0.222 0.207

</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="5.5" PeakHeight="340.358" Num="5" zHalfNm="310.436" Error="4.58">
-103.76 -23.087 10.818 -1.295 -1.85
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.184" Depth="0.154"/>
<TopsideChapman PeakHeight="340.358" PeakDensity="375310.2" PeakScaleHeight="22.716" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
