<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 20:00:00.000"
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="12.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.21 (294) 20:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410212000009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.507" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.822" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.164" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.966" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.390" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.193" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.466" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="164.751" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.880" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.786" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="169.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="102">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 312.000 314.000 316.000 318.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 326.429 327.857 329.286 330.714 332.143 333.571 335.000 337.500 340.000 342.500 345.000 347.500 350.000 351.667 353.333 355.000 356.364 357.727 359.091 360.455 361.818 363.182 364.545 365.909 367.273 368.636 370.000 370.000 372.500 375.000 375.000 377.500 380.000 382.500 385.000 387.845 390.690 393.535 396.380 399.224 402.069 404.914 407.759 410.604 413.449 416.294 419.139 421.984 424.829 427.673 430.518 433.363 436.208 439.053 441.898 444.743 447.588 450.433 453.278 456.122 458.967 461.812 464.657 467.502 470.347 473.192 476.037 478.882 481.727 484.571 487.416 490.261 493.106 497.164 501.602 506.479 510.000 520.000 525.000 530.000 540.000 550.000 560.000 575.000 590.000 605.000 630.000 655.000 690.000 737.646
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 78 0 0 78 0 0 75 0 0 0 0 0 0 81 0 0 0 0 0 75 0 0 72 0 0 0 69 0 0 0 0 84 0 81 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 -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 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.953125 -1.953125 -0.390625 -0.390625 -0.390625 1.953125 2.734375 2.734375 -0.390625 -1.171875 2.734375 -0.390625 2.734375 0.390625 1.171875 1.171875 -2.734375 -1.953125 -2.734375 0.390625 -2.734375 -0.390625 2.734375 1.171875 -1.953125 1.171875 -1.953125 0.390625 2.734375 -2.734375 -2.734375 -1.171875 0.390625 -2.734375 -1.953125 -0.390625 -1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.625 106.250 106.875 107.500 108.125 108.750 109.375 110.000 105.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 75 0 0 0 0 0 72 0 0 0 0 0 0 0 0 78 0 69 0 0 0 0 66 69 0 69
</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 -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
</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" >
89.77 90.0 95.0 100.0 105.0 110.0 115.0 118.398 120.0 125.0 126.795 130.0 135.0 135.193 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.39 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.317 1.703 1.903 1.966 1.92 1.833 1.833 1.833 1.833 1.884 1.963 1.966 2.095 2.234 2.377 2.525 2.679 2.839 3.005 3.177 3.356 3.541 3.731 3.928 4.13 4.337 4.549 4.764 4.983 5.206 5.43 5.657 5.884 6.113 6.341 6.57 6.797 7.023 7.248 7.47 7.689 7.905 8.116 8.324 8.527 8.724 8.915 9.1 9.278 9.448 9.61 9.762 9.906 10.039 10.161 10.272 10.372 10.459 10.533 10.594 10.641 10.675 10.695 10.7 10.7 10.696 10.685 10.668 10.645 10.617 10.582 10.543 10.498 10.449 10.395 10.337 10.275 10.209 10.14 10.067 9.99 9.911 9.829 9.745 9.658 9.569 9.478 9.385 9.291 9.195 9.098 8.999 8.899 8.799 8.697 8.595 8.492 8.389 8.285 8.182 8.078 7.974 7.87 7.766 7.662 7.558 7.455 7.352 7.25 7.148 7.046 6.946 6.845 6.746 6.647 6.549 6.452 6.355 6.26 6.165 6.071 5.978 5.886 5.795 5.705 5.616 5.528 5.441 5.354 5.269 5.185 5.102 5.02 4.939 4.86 4.781 4.703 4.626 4.55 4.476 4.402 4.329 4.258 4.187 4.118 4.049 3.982 3.915 3.849 3.785 3.721 3.659 3.597 3.536 3.476 3.417 3.359 3.302 3.246 3.191 3.136 3.083 3.03 2.978 2.927 2.877 2.827 2.779 2.731 2.684 2.638 2.592 2.548 2.504 2.46 2.418 2.376 2.335 2.294 2.254 2.215 2.177 2.139 2.102 2.065 2.029

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.966" PeakHeight="110.0" Num="3" Error="0.0">
-29.016 11.046 -2.26
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.966" EndFrequency="10.7" PeakHeight="394.39" Num="5" zHalfNm="277.193" Error="1.657">
-258.219 -2.057 1.801 -1.228 0.506
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.193" Depth="0.133"/>
<TopsideChapman PeakHeight="394.39" PeakDensity="1420471.5" PeakScaleHeight="87.786" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
