<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 01:10:00.000"
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" >
2026.03.13 (072) 01:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607203130110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.213" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.488" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="362.303" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="322.761" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.474" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.949" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="37.701" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.121" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="19.219" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 292.500 295.000 297.500 300.000 300.833 301.667 302.500 303.333 304.167 305.000 305.000 310.000 309.722 309.444 309.167 308.889 308.611 308.333 308.056 307.778 307.500 307.222 306.944 306.667 306.389 306.111 305.833 305.556 305.278 305.000 305.000 305.000 305.000 310.000 315.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 340.000 336.667 333.333 330.000 330.000 330.000 330.000 328.333 326.667 325.000 325.000 325.000 325.000 325.000 325.000 325.000 327.500 320.000 320.000 325.000 330.000 335.000 336.667 338.333 340.000 345.000 350.000 355.000 355.000 360.000 360.880 362.303 365.000 372.060 438.934
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 63 57 54 0 0 60 0 0 60 63 60 0 0 0 60 0 57 0 0 0 60 63 0 63 0 0 0 0 54 51 0 54 0 51 69 60 63 63 63 0 57 57 51 0 57 0 0 57 54 57 0 0 0 51 54 0 51 0 0 57 57 60 57 57 0 66 63 54 0 63 60 63 54 60 60 0 57 60 57 0 57 0 0 60 63 54 60 57 60 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 1.953125 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 -1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 1.171875 1.171875 -0.390625 -1.171875 0.390625 -1.171875 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.171875 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="101">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.987 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.974 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.961 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.761 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0
</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 0.221 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.225 0.246 0.267 0.288 0.308 0.329 0.35 0.354 0.444 0.601 0.788 0.989 1.201 1.428 1.671 1.935 2.222 2.537 2.885 3.27 3.696 4.167 4.681 5.23 5.789 6.31 6.726 6.964 7.0 6.991 6.911 6.76 6.555 6.307 6.03 5.734 5.427 5.117 4.808 4.504 4.21 3.927 3.656 3.399 3.156 2.928 2.713 2.512 2.325 2.15 1.988 1.837 1.696 1.567 1.446 1.335 1.232 1.137 1.049 0.968 0.892 0.823 0.759 0.7 0.646 0.595 0.549 0.506 0.467 0.43 0.397 0.366 0.337 0.311 0.287 0.264 0.244 0.225 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="7.0" PeakHeight="322.761" Num="5" zHalfNm="297.474" Error="2.646">
-90.302 -17.929 7.275 0.17 -1.014
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.961" Depth="0.154"/>
<TopsideChapman PeakHeight="322.761" PeakDensity="607940.44" PeakScaleHeight="19.219" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
