<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 06:20:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.01.31 (031) 06:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603101310620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.285" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.737" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.050" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="316.584" 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="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="291.077" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.125" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.285" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.010" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.028" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.680" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="65">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 220.000 221.250 222.500 223.750 225.000 226.250 227.500 228.750 230.000 231.250 232.500 233.750 235.000 235.000 235.000 235.000 235.000 237.500 240.000 240.000 240.000 240.000 240.000 240.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 257.500 260.000 260.000 260.000 260.000 265.000 270.000 270.000 275.000 280.000 282.500 285.000 285.000 285.000 290.000 293.916 298.385 303.531 309.522 316.584 325.033 335.321 348.124 364.490 386.147 416.158 460.510 532.710
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 66 66 0 0 0 0 0 66 0 0 0 0 0 63 63 0 66 72 0 57 0 0 72 75 75 66 54 0 63 63 72 69 54 60 63 0 51 69 72 72 0 66 75 69 57 0 57 66 63 66 69 0 0 0 0 60 0 0 63 0 54 0 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 -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 -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 -1.171875 -1.171875 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="161">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.667 140.0 145.0 150.0 155.0 160.0 161.333 165.0 170.0 175.0 180.0 185.0 187.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 291.077 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0
</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 0.393 0.478 0.6 0.787 1.105 1.823 2.916 3.545 3.957 4.263 4.505 4.701 4.863 4.997 5.107 5.198 5.27 5.325 5.365 5.389 5.4 5.4 5.397 5.383 5.358 5.325 5.283 5.233 5.176 5.113 5.044 4.971 4.892 4.81 4.725 4.637 4.546 4.454 4.361 4.266 4.17 4.074 3.978 3.883 3.787 3.692 3.598 3.505 3.413 3.322 3.232 3.144 3.057 2.972 2.888 2.806 2.726 2.647 2.57 2.495 2.422 2.35 2.28 2.212 2.146 2.081 2.018 1.957 1.897 1.84 1.783 1.728 1.675 1.623 1.573 1.524 1.477 1.431 1.386 1.343 1.301 1.26 1.221 1.182 1.145 1.109 1.074 1.04 1.007 0.975 0.945 0.915 0.886 0.858 0.83 0.804 0.778 0.754 0.73 0.707 0.684 0.662 0.641 0.621 0.601 0.582 0.563 0.545 0.528 0.511 0.495 0.479 0.464 0.449 0.435 0.421 0.407 0.394 0.382 0.369 0.358 0.346 0.335 0.324 0.314 0.304 0.294 0.285 0.276 0.267 0.258 0.25 0.242 0.234 0.227 0.22 0.213 0.206

</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="5.4" PeakHeight="291.077" Num="5" zHalfNm="228.125" Error="2.692">
-137.149 55.072 -27.191 6.307 -1.116
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.0" Depth="0.154"/>
<TopsideChapman PeakHeight="291.077" PeakDensity="361786.6" PeakScaleHeight="48.028" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
