<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 22:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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) 22:00:00</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">
FF202603001302200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.306" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.450" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="595.000" 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="0.417" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="474.813" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="394.095" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.007" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.904" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.839" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.414" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="123.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="140">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 372.000 374.000 376.000 378.000 380.000 380.000 380.000 380.000 380.000 381.429 382.857 384.286 385.714 387.143 388.571 390.000 391.000 392.000 393.000 394.000 395.000 395.000 395.000 397.500 400.000 400.000 401.154 402.308 403.462 404.615 405.769 406.923 408.077 409.231 410.385 411.538 412.692 413.846 415.000 416.667 418.333 420.000 421.667 423.333 425.000 425.000 425.000 425.000 420.000 425.000 430.000 431.250 432.500 433.750 435.000 436.000 437.000 438.000 439.000 440.000 440.000 442.500 445.000 445.000 450.000 451.500 453.000 454.500 456.000 457.500 459.000 460.500 462.000 463.500 465.000 465.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 486.250 487.500 488.750 490.000 500.000 500.000 500.000 500.000 505.000 515.000 516.667 518.333 520.000 520.000 522.500 525.000 525.000 530.000 535.000 540.000 540.000 545.000 550.000 555.000 555.000 560.000 562.500 565.000 570.000 575.000 585.000 585.000 590.000 595.000 605.000 610.000 615.000 622.791 631.657 641.835 653.640 667.497
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 51 0 0 0 0 75 0 72 0 0 0 0 0 69 72 72 75 72 0 0 0 0 0 0 69 0 0 0 0 0 0 63 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 0 54 0 0 51 60 66 51 0 0 54 0 60 0 0 54 0 0 0 60 66 0 72 75 66 0 0 0 0 0 0 0 0 0 60 0 60 0 63 66 0 69 60 66 69 60 63 0 0 0 63 66 0 66 69 66 57 48 0 69 69 60 66 72 75 72 72 69 72 72 60 69 63 0 0 57 57 48 54 54 51 51 51 51 48 48 48 0 45
</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 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.446 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.072 140.0 145.0 150.0 155.0 160.0 165.0 168.143 170.0 175.0 180.0 185.0 190.0 195.0 197.215 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 474.813 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.276 0.361 0.404 0.417 0.412 0.398 0.372 0.333 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.251 0.289 0.326 0.363 0.4 0.417 0.457 0.523 0.587 0.652 0.719 0.788 0.861 0.939 1.021 1.108 1.201 1.299 1.404 1.515 1.633 1.758 1.89 2.029 2.176 2.33 2.491 2.659 2.835 3.017 3.206 3.401 3.602 3.809 4.022 4.24 4.463 4.691 4.922 5.158 5.397 5.638 5.882 6.128 6.374 6.621 6.866 7.11 7.35 7.586 7.815 8.037 8.248 8.447 8.632 8.799 8.946 9.07 9.17 9.242 9.286 9.3 9.3 9.293 9.275 9.246 9.206 9.156 9.097 9.03 8.955 8.873 8.784 8.689 8.589 8.483 8.373 8.26 8.143 8.022 7.9 7.775 7.648 7.52 7.39 7.26 7.129 6.997 6.866 6.735 6.604 6.473 6.343 6.215 6.087 5.96 5.834 5.71 5.587 5.466 5.346 5.228 5.111 4.997 4.884 4.773 4.664 4.556 4.451 4.347 4.246 4.146 4.048 3.952 3.858 3.766 3.676 3.588 3.501 3.417 3.334 3.253 3.174 3.096 3.02 2.946 2.874 2.803 2.734 2.666 2.6 2.536 2.473 2.411 2.351 2.292 2.235 2.179 2.125 2.072 2.02 1.969 1.919 1.871 1.824 1.778 1.733 1.69 1.647 1.605 1.565 1.525 1.487 1.449 1.412 1.377 1.342 1.308 1.275 1.242 1.211 1.18 1.15 1.121 1.092 1.065 1.038 1.011

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.417" PeakHeight="110.0" Num="3" Error="0.0">
-20.647 3.342 -0.249
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.417" EndFrequency="9.3" PeakHeight="474.813" Num="5" zHalfNm="394.095" Error="4.8">
-261.778 -26.766 11.627 -2.649 1.968
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.215" Depth="0.217"/>
<TopsideChapman PeakHeight="474.813" PeakDensity="1073076.9" PeakScaleHeight="60.414" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
