<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 20:50:00.000"
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="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) 20:50:00</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">
FF202629410212050009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.465" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.008" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="521.896" 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="1.010" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="402.989" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="310.718" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.246" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.695" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.123" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.121" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="134.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.910" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 310.000 310.625 311.250 311.875 312.500 313.125 313.750 314.375 315.000 315.000 316.176 317.353 318.529 319.706 320.882 322.059 323.235 324.412 325.588 326.765 327.941 329.118 330.294 331.471 332.647 333.824 335.000 340.000 340.000 340.000 340.000 345.000 345.000 346.000 347.000 348.000 349.000 350.000 355.000 360.000 361.250 362.500 363.750 365.000 366.250 367.500 368.750 370.000 371.250 372.500 373.750 375.000 376.250 377.500 378.750 380.000 382.500 385.000 387.500 390.000 392.500 395.000 395.000 395.000 395.000 398.161 401.321 404.482 407.643 410.804 413.964 417.125 420.286 423.447 426.607 429.768 432.929 436.090 439.250 442.411 445.572 448.733 451.893 455.054 458.215 461.376 464.536 467.697 470.858 474.019 477.179 480.340 483.501 486.661 489.822 492.983 496.144 499.304 502.465 505.626 508.787 511.947 515.108 518.269 521.896 525.868 530.236 535.064 540.000 545.000 555.000 560.000 570.000 580.000 590.000 605.000 620.000 642.139
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 0 0 0 0 0 0 0 0 0 75 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 84 0 0 0 84 81 0 0 0 0 69 72 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 84 0 0 0 0 0 72 81 87 87 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 -1.171875 -0.390625 -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 -1.953125 -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 -1.171875 -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 -0.390625 -1.171875 2.734375 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -1.953125 -1.953125 2.734375 -0.390625 -0.390625 0.390625 1.171875 1.171875 -2.734375 -1.953125 -1.953125 -2.734375 -1.171875 1.953125 -1.953125 2.734375 -0.390625 -2.734375 -2.734375 2.734375 2.734375 -2.734375 1.171875 -1.953125 -1.171875 2.734375 -2.734375 1.171875 2.734375 0.390625 -2.734375 -0.390625 1.171875 1.171875 -1.953125 0.390625 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" >
90.26 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.74 130.0 135.0 140.0 143.481 145.0 150.0 155.0 160.0 160.221 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 402.989 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.672 0.875 0.978 1.01 0.993 0.94 0.847 0.802 0.802 0.802 0.802 0.802 0.821 0.883 0.945 1.007 1.01 1.132 1.249 1.366 1.486 1.613 1.748 1.892 2.047 2.216 2.397 2.593 2.803 3.025 3.26 3.505 3.759 4.018 4.282 4.548 4.816 5.084 5.351 5.617 5.882 6.145 6.406 6.664 6.921 7.174 7.424 7.671 7.915 8.155 8.39 8.62 8.844 9.061 9.27 9.47 9.659 9.836 9.998 10.144 10.271 10.376 10.458 10.515 10.545 10.55 10.549 10.539 10.519 10.489 10.45 10.402 10.345 10.281 10.21 10.131 10.047 9.957 9.861 9.761 9.656 9.547 9.434 9.318 9.199 9.077 8.954 8.828 8.7 8.572 8.442 8.311 8.179 8.047 7.915 7.783 7.651 7.519 7.388 7.257 7.127 6.997 6.869 6.742 6.615 6.49 6.367 6.244 6.123 6.003 5.885 5.769 5.654 5.54 5.428 5.318 5.21 5.103 4.998 4.894 4.793 4.693 4.594 4.498 4.403 4.31 4.218 4.128 4.04 3.953 3.869 3.785 3.704 3.623 3.545 3.468 3.392 3.318 3.246 3.175 3.105 3.037 2.97 2.905 2.841 2.778 2.717 2.657 2.598 2.54 2.484 2.429 2.375 2.322 2.27 2.219 2.17 2.121 2.074 2.028 1.982 1.938 1.894 1.852 1.81 1.77 1.73 1.691 1.653 1.616 1.58 1.544 1.509 1.476 1.442 1.41 1.378 1.347 1.317 1.287 1.258 1.23 1.202 1.175 1.148 1.122

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.01" PeakHeight="110.0" Num="3" Error="0.0">
-26.549 8.044 -1.235
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.01" EndFrequency="10.55" PeakHeight="402.989" Num="5" zHalfNm="310.718" Error="4.761">
-238.95 -9.267 8.664 -6.303 3.088
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.221" Depth="0.208"/>
<TopsideChapman PeakHeight="402.989" PeakDensity="1380924.4" PeakScaleHeight="68.121" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
