<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 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="14.0">
<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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Moderate F-spread, F2x cusp not found, 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" >
2026.10.30 (303) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630310302140009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.181" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.596" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="670.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="520.546" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="431.822" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.746" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.122" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.795" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.637" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="144.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" 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" >
1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 371.667 373.333 375.000 375.000 375.000 390.000 401.667 413.333 425.000 407.500 390.000 388.333 386.667 385.000 380.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 387.500 390.000 392.500 395.000 397.500 400.000 400.000 400.000 405.000 405.000 405.000 415.833 426.667 437.500 448.333 459.167 470.000 480.000 482.500 485.000 487.872 490.745 493.617 496.489 499.362 502.234 505.106 507.979 510.851 513.723 516.596 519.468 522.340 525.213 528.085 530.957 533.830 536.702 539.574 542.447 545.319 548.191 551.064 553.936 556.809 559.681 562.553 565.426 568.298 571.170 574.043 576.915 579.787 582.660 585.532 588.404 591.277 594.149 597.021 599.894 602.766 605.638 608.511 611.383 614.255 617.128 620.000 625.000 625.000 630.000 630.000 635.000 640.000 640.000 640.000 645.000 645.000 650.000 655.000 660.000 665.000 665.000 670.000 680.000 692.055 709.789
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 63 0 69 57 0 0 0 0 0 0 0 54 0 0 0 72 72 0 0 0 0 0 0 0 0 72 0 66 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 54 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 63 66 63 60 63 66 60 63 60 66 57 0 60 60 57 57 57 57 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -2.734375 -1.171875 -0.390625 -2.734375 -2.734375 -2.734375 -1.953125 0.390625 -0.390625 -1.171875 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 -1.171875 -1.171875 -1.171875 -0.390625 1.953125 0.390625 1.953125 -1.171875 -0.390625 2.734375 -0.390625 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625 2.734375 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 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 0.390625 -2.734375
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.253 145.0 150.0 155.0 160.0 165.0 170.0 170.506 175.0 180.0 185.0 190.0 195.0 200.0 200.759 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 520.546 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.323 0.297 0.259 0.203 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.223 0.248 0.274 0.299 0.325 0.35 0.354 0.42 0.465 0.506 0.545 0.584 0.625 0.667 0.713 0.761 0.813 0.869 0.931 0.998 1.073 1.155 1.245 1.344 1.451 1.565 1.686 1.813 1.943 2.075 2.208 2.342 2.475 2.607 2.739 2.869 2.998 3.127 3.254 3.381 3.507 3.632 3.757 3.882 4.007 4.131 4.256 4.38 4.505 4.63 4.756 4.882 5.009 5.137 5.266 5.395 5.525 5.657 5.789 5.923 6.057 6.192 6.328 6.463 6.597 6.727 6.851 6.964 7.058 7.123 7.15 7.15 7.147 7.135 7.116 7.089 7.055 7.015 6.969 6.917 6.86 6.798 6.732 6.661 6.587 6.51 6.429 6.346 6.26 6.173 6.083 5.992 5.9 5.806 5.712 5.617 5.522 5.426 5.33 5.234 5.138 5.043 4.948 4.853 4.759 4.666 4.574 4.482 4.391 4.302 4.213 4.125 4.039 3.954 3.87 3.787 3.705 3.625 3.546 3.468 3.392 3.317 3.243 3.171 3.099 3.03 2.961 2.894 2.828 2.764 2.7 2.638 2.578 2.518 2.46 2.403 2.347 2.292 2.239 2.187 2.135 2.085 2.036 1.988 1.941 1.896 1.851 1.807 1.764 1.722 1.682 1.642 1.602 1.564 1.527 1.491 1.455 1.42 1.386 1.353 1.321 1.289 1.258 1.228 1.199 1.17 1.142 1.114

</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="7.15" PeakHeight="520.546" Num="5" zHalfNm="431.822" Error="9.351">
-289.485 -57.508 40.05 -24.937 12.093
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="90.759" Depth="0.154"/>
<TopsideChapman PeakHeight="520.546" PeakDensity="634274.2" PeakScaleHeight="63.637" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
