<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 02:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.01.30 (030) 02:00:00</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">
FF202603001300200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.129" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.039" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" 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="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="295.801" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.653" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.526" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.490" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.676" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.386" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.970" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 215.000 215.000 215.000 215.000 215.000 215.500 216.000 216.500 217.000 217.500 218.000 218.500 219.000 219.500 220.000 220.000 220.000 221.667 223.333 225.000 225.000 225.000 225.000 220.000 230.000 225.000 225.000 226.429 227.857 229.286 230.714 232.143 233.571 235.000 230.000 232.500 235.000 235.000 235.000 235.000 236.000 237.000 238.000 239.000 240.000 240.000 240.000 240.000 240.000 242.500 245.000 245.000 245.000 245.000 246.111 247.222 248.333 249.444 250.556 251.667 252.778 253.889 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 266.000 267.000 268.000 269.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 290.000 292.500 295.000 295.000 296.667 298.333 300.000 300.000 300.000 302.895 305.789 308.684 311.579 314.474 317.368 320.263 323.158 326.053 328.947 331.842 334.737 337.632 340.526 343.421 346.316 349.211 352.105 355.000 360.000 360.000 360.000 360.000 370.000 370.000 375.000 380.000 385.000 392.236 401.492 413.750 430.756
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 60 69 0 75 75 0 0 0 0 0 54 0 54 0 75 72 0 0 0 69 69 69 0 0 54 60 63 0 0 0 0 60 0 63 0 0 66 66 0 48 0 0 0 0 63 63 63 0 57 0 63 0 66 66 0 57 0 0 0 0 0 0 57 63 0 66 54 69 0 0 66 81 81 72 0 0 66 69 0 0 0 48 63 48 72 60 63 66 60 69 69 63 66 66 66 60 75 72 66 69 72 69 75 69 69 66 81 78 0 63 75 0 75 0 78 75 75 75 72 72 72 75 69 75 69 72 69 75 72 69 66 66 66 72 75 63 72 69 69 69 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 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 -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 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="156">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 295.801 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.333 0.306 0.262 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.238 0.269 0.301 0.332 0.354 0.397 0.526 0.678 0.898 1.308 2.268 3.338 4.159 4.849 5.46 6.017 6.531 7.008 7.451 7.859 8.233 8.568 8.863 9.114 9.316 9.466 9.561 9.599 9.6 9.59 9.551 9.487 9.4 9.292 9.166 9.023 8.867 8.698 8.52 8.333 8.139 7.94 7.737 7.531 7.324 7.115 6.908 6.701 6.495 6.292 6.092 5.895 5.701 5.511 5.324 5.143 4.965 4.792 4.623 4.459 4.3 4.146 3.996 3.85 3.709 3.573 3.441 3.313 3.19 3.071 2.956 2.845 2.738 2.634 2.535 2.439 2.346 2.257 2.171 2.088 2.008 1.931 1.857 1.786 1.717 1.651 1.587 1.526 1.467 1.411 1.356 1.304 1.254 1.205 1.158 1.114 1.071 1.029 0.989 0.951 0.914 0.879 0.845 0.812 0.78 0.75 0.721 0.693 0.666 0.64 0.615 0.591 0.568 0.546 0.525 0.505 0.485 0.466 0.448 0.431 0.414 0.398 0.382 0.368 0.353 0.34 0.326 0.314 0.301 0.29 0.278 0.268 0.257 0.247 0.238 0.228 0.219 0.211 0.203

</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="9.6" PeakHeight="295.801" Num="5" zHalfNm="242.653" Error="3.37">
-134.128 30.402 -7.425 -3.944 2.794
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.154"/>
<TopsideChapman PeakHeight="295.801" PeakDensity="1143424.4" PeakScaleHeight="39.386" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
