<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 14:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.10 (069) 14:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606903101450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.662" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.280" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.834" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.405" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.367" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="340.512" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.956" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.116" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.905" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.848" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.452" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="162.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 341.429 342.857 344.286 345.714 347.143 348.571 350.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 422.500 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 450.000 452.222 454.444 456.667 458.889 461.111 463.333 465.556 467.778 470.000 470.000 471.606 473.376 475.335 477.515 479.956 482.708 485.834 489.416 493.562 498.416 504.178 511.126 519.671 530.433
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 0 0 0 45 0 45 45 54 60 0 54 57 57 0 0 0 0 0 0 60 0 0 60 54 54 51 48 48 57 60 63 48 60 63 66 60 63 63 63 66 66 66 69 63 69 60 66 57 60 60 51 60 60 57 57 60 57 60 66 63 63 0 60 0 66 60 57 0 63 60 63 63 63 63 0 63 57 51 57 54 51 0 0 0 0 0 0 0 0 42 48 0 54 0 42 48 54 51 51 39 51 48 45 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 2.734375 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 2.734375 -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 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 -2.734375 -0.390625 -0.390625 2.734375 -0.390625 1.171875 1.953125 -1.953125 0.390625 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.481 90.0 95.0 100.0 105.0 110.0 111.488 112.977 114.465 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.512 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.291 2.947 3.294 3.405 3.282 3.282 3.405 3.434 3.676 3.888 4.084 4.269 4.447 4.619 4.788 4.954 5.118 5.281 5.443 5.604 5.766 5.928 6.09 6.253 6.417 6.583 6.75 6.918 7.089 7.261 7.436 7.613 7.792 7.974 8.16 8.348 8.54 8.736 8.935 9.138 9.346 9.558 9.775 9.996 10.222 10.452 10.684 10.917 11.146 11.363 11.553 11.691 11.749 11.75 11.744 11.724 11.691 11.646 11.588 11.52 11.441 11.353 11.256 11.151 11.038 10.919 10.793 10.662 10.526 10.386 10.241 10.093 9.943 9.789 9.634 9.477 9.318 9.159 8.999 8.838 8.678 8.517 8.357 8.198 8.039 7.881 7.724 7.569 7.415 7.263 7.112 6.963 6.816 6.671 6.528 6.386 6.247 6.11 5.976 5.843 5.713 5.584 5.459 5.335 5.214 5.095 4.978 4.863 4.751 4.641 4.533 4.427 4.323 4.222 4.123 4.025 3.93 3.837 3.746 3.657 3.57 3.485 3.401 3.32 3.24 3.162 3.086 3.012 2.939 2.868 2.799 2.731 2.665 2.6 2.537 2.476 2.416 2.357 2.299 2.243 2.189 2.135 2.083 2.032 1.983 1.934 1.887 1.841 1.795 1.751 1.709 1.667 1.626 1.586 1.547 1.509 1.472 1.436 1.4 1.366 1.332 1.3 1.268 1.236 1.206 1.176 1.147 1.119 1.092 1.065 1.038 1.013 0.988 0.964 0.94 0.917 0.894 0.872 0.85 0.83 0.809 0.789 0.77 0.751 0.732 0.714

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.405" PeakHeight="110.0" Num="3" Error="0.0">
-30.51 13.166 -3.175
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.405" EndFrequency="11.75" PeakHeight="340.512" Num="5" zHalfNm="253.956" Error="3.238">
-179.177 -69.648 23.513 -0.745 0.01
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.465" Depth="0.123"/>
<TopsideChapman PeakHeight="340.512" PeakDensity="1712934.2" PeakScaleHeight="62.452" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
