<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 22:20:00.000"
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 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" >
2026.02.01 (032) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603202012220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.415" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.995" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="521.667" 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="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="482.214" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="408.495" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.770" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.457" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.691" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.854" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="119.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 420.000 420.000 425.000 430.000 435.000 440.000 437.500 435.000 436.875 438.750 440.625 442.500 444.375 446.250 448.125 450.000 450.000 450.000 450.000 450.000 450.000 450.357 450.714 451.071 451.429 451.786 452.143 452.500 452.857 453.214 453.571 453.929 454.286 454.643 455.000 460.000 462.500 465.000 467.500 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 480.000 485.000 487.500 490.000 490.000 490.000 490.000 490.000 490.000 491.667 493.333 495.000 496.667 498.333 500.000 501.667 503.333 505.000 506.667 508.333 510.000 511.667 513.333 515.000 516.667 518.333 520.000 521.667 575.000 575.000 581.000 587.000 593.000 599.000 605.000 610.909 616.818 622.727 628.636 654.088
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 60 0 0 54 0 54 0 0 60 0 57 0 51 60 60 0 0 54 54 0 51 0 51 0 0 0 60 57 57 0 54 0 54 54 0 54 57 57 0 0 0 54 57 57 60 57 63 60 60 57 57 60 60 60 0 54 0 0 0 60 60 63 0 57 0 63 63 63 57 57 60 63 54 0 60 0 57 54 54 54 54 63 60 0 0 54 54 0 0 0 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 -1.171875 0.390625 0.390625 -0.390625 -0.390625 1.171875 0.390625 1.171875 0.390625 2.734375 -0.390625 0.390625 0.390625 1.171875 -2.734375 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 -0.390625 -2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -2.734375 0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -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 -2.734375 0.390625 0.390625 0.390625 2.734375 -2.734375 -1.171875 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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.992 145.0 150.0 155.0 160.0 165.0 170.0 171.984 175.0 180.0 185.0 190.0 195.0 200.0 202.976 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 482.214 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.264 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.24 0.265 0.29 0.314 0.339 0.354 0.37 0.414 0.465 0.523 0.587 0.655 0.727 0.802 0.878 0.957 1.038 1.121 1.206 1.294 1.384 1.477 1.572 1.67 1.772 1.876 1.984 2.096 2.211 2.331 2.454 2.582 2.715 2.852 2.994 3.142 3.294 3.452 3.616 3.786 3.961 4.142 4.328 4.52 4.716 4.918 5.123 5.331 5.541 5.751 5.959 6.165 6.364 6.555 6.735 6.901 7.049 7.178 7.284 7.366 7.42 7.447 7.45 7.448 7.436 7.414 7.381 7.339 7.289 7.231 7.165 7.093 7.014 6.93 6.841 6.748 6.651 6.551 6.447 6.341 6.233 6.123 6.012 5.899 5.786 5.673 5.559 5.445 5.331 5.218 5.105 4.994 4.883 4.773 4.664 4.556 4.45 4.346 4.242 4.141 4.041 3.942 3.846 3.751 3.657 3.566 3.476 3.389 3.303 3.218 3.136 3.055 2.976 2.899 2.823 2.75 2.678 2.607 2.539 2.472 2.406 2.342 2.28 2.219 2.16 2.102 2.046 1.991 1.938 1.886 1.835 1.785 1.737 1.69 1.644 1.6 1.556 1.514 1.473 1.433 1.394 1.356 1.319 1.283 1.248 1.214 1.181 1.148 1.117 1.086 1.057 1.028 1.0 0.972 0.945 0.92 0.894 0.87 0.846 0.823 0.8 0.778 0.757 0.736 0.716 0.696 0.677

</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="7.45" PeakHeight="482.214" Num="5" zHalfNm="408.495" Error="5.686">
-255.027 -40.069 17.957 0.062 -2.161
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="92.976" Depth="0.154"/>
<TopsideChapman PeakHeight="482.214" PeakDensity="688616.6" PeakScaleHeight="55.854" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
