<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 21:40:00.000"
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: F2x cusp not found, Multiple candidates for F2x cusp, 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" >
2026.02.02 (033) 21:40:00</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">
FF202603302022140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.219" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.750" 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="9.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="591.667" 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="0.652" 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="473.575" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="370.051" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.130" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.850" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.922" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.940" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 340.000 340.833 341.667 342.500 343.333 344.167 345.000 345.000 350.000 347.500 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 361.667 363.333 365.000 365.000 365.909 366.818 367.727 368.636 369.545 370.455 371.364 372.273 373.182 374.091 375.000 376.667 378.333 380.000 385.000 385.000 390.000 391.875 393.750 395.625 397.500 399.375 401.250 403.125 405.000 410.000 411.667 413.333 415.000 410.000 412.778 415.556 418.333 421.111 423.889 426.667 429.444 432.222 435.000 437.308 439.615 441.923 444.231 446.538 448.846 451.154 453.462 455.769 458.077 460.385 462.692 465.000 460.000 462.941 465.882 468.824 471.765 474.706 477.647 480.588 483.529 486.471 489.412 492.353 495.294 498.235 501.176 504.118 507.059 510.000 510.000 510.000 517.500 525.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 591.667 598.333 605.000 611.667 618.333 625.000 630.000 638.000 646.000 654.000 662.000 670.000 679.680 690.199 701.670 714.229
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 57 0 0 0 0 0 69 63 51 0 63 60 66 0 69 63 0 63 57 66 69 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 51 54 57 51 0 0 0 0 0 0 0 66 57 0 0 60 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 57 0 54 0 51 0 0 63 0 0 0 0 0 0 0 0 0 0 0 0 63 66 63 0 54 0 0 0 45 0 48 0 0 0 0 45 48 0 45 0 57 0 57 48 0 0 51 0 57 54 57 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -0.390625 -1.171875 1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 2.734375 -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 -1.953125 1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.953125 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875
</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" >
90.911 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.752 140.0 145.0 150.0 155.0 160.0 161.503 165.0 170.0 175.0 180.0 185.0 187.255 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 473.575 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.432 0.565 0.631 0.652 0.643 0.614 0.562 0.482 0.349 0.32 0.32 0.32 0.32 0.32 0.32 0.32 0.365 0.43 0.494 0.558 0.623 0.652 0.706 0.785 0.857 0.927 0.998 1.073 1.152 1.236 1.326 1.424 1.531 1.647 1.775 1.915 2.067 2.231 2.407 2.592 2.785 2.984 3.186 3.39 3.595 3.799 4.002 4.203 4.403 4.6 4.796 4.989 5.181 5.371 5.558 5.744 5.929 6.111 6.291 6.47 6.647 6.821 6.994 7.163 7.33 7.494 7.653 7.808 7.958 8.102 8.239 8.367 8.486 8.592 8.686 8.765 8.827 8.87 8.895 8.9 8.9 8.894 8.881 8.861 8.835 8.802 8.764 8.72 8.671 8.617 8.559 8.496 8.429 8.358 8.284 8.207 8.126 8.043 7.958 7.87 7.781 7.689 7.596 7.501 7.406 7.309 7.211 7.113 7.014 6.914 6.814 6.714 6.614 6.514 6.414 6.315 6.215 6.116 6.018 5.92 5.822 5.726 5.63 5.535 5.44 5.347 5.255 5.163 5.072 4.983 4.894 4.807 4.72 4.635 4.551 4.468 4.386 4.305 4.225 4.147 4.07 3.993 3.918 3.845 3.772 3.7 3.63 3.561 3.493 3.426 3.36 3.295 3.231 3.169 3.107 3.047 2.988 2.929 2.872 2.816 2.76 2.706 2.653 2.601 2.549 2.499 2.45 2.401 2.354 2.307 2.261 2.216 2.172 2.129 2.086 2.045 2.004 1.964 1.924 1.886 1.848 1.811 1.775 1.739 1.704 1.67

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.652" PeakHeight="110.0" Num="3" Error="0.0">
-24.218 5.802 -0.673
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.652" EndFrequency="8.9" PeakHeight="473.575" Num="5" zHalfNm="370.051" Error="7.727">
-281.498 -12.288 12.403 -11.028 6.091
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.255" Depth="0.332"/>
<TopsideChapman PeakHeight="473.575" PeakDensity="982754.3" PeakScaleHeight="75.922" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
